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These are the user uploaded subtitles that are being translated: 1 00:00:02,000 --> 00:00:07,000 For best IPTV provider, please visit: WWW.IPTV.CAT For best IPTV provider, please visit: WWW.IPTV.CAT.BZ 2 00:00:08,000 --> 00:00:13,000 For best IPTV provider, please visit: WWW.IPTV.CAT For best IPTV provider, please visit: WWW.IPTV.CAT.BZ 3 00:00:59,058 --> 00:01:00,310 There are those in science 4 00:01:00,351 --> 00:01:04,314 who say the exquisite nature of the universe, 5 00:01:04,355 --> 00:01:05,857 the exquisite laws of the universe, 6 00:01:07,525 --> 00:01:09,486 are evidence of a designer. 7 00:01:12,697 --> 00:01:14,115 Does that view make sense to you? 8 00:01:28,755 --> 00:01:30,757 For 2,500 years, there have been two great 9 00:01:30,799 --> 00:01:33,802 competing stories about reality in Western culture. 10 00:01:36,095 --> 00:01:40,642 According to one of these stories, the universe, our planet, 11 00:01:40,683 --> 00:01:44,062 the life it contains, and especially all of us, 12 00:01:44,145 --> 00:01:47,065 are products of a pre-existing intelligence, 13 00:01:47,148 --> 00:01:48,733 a purposeful mind or creator. 14 00:01:50,902 --> 00:01:53,863 People like Galileo, Kepler, 15 00:01:54,948 --> 00:01:58,785 Newton were all believers in the existence 16 00:01:58,827 --> 00:02:01,746 of an intelligent designer behind the universe. 17 00:02:01,788 --> 00:02:03,998 Newton, Boyle, Kepler, the great founders 18 00:02:04,082 --> 00:02:07,377 of modern science, thought that nature had secrets to reveal. 19 00:02:07,460 --> 00:02:09,462 There were patterns there to be revealed 20 00:02:09,504 --> 00:02:11,965 that we could understand because our minds had been made 21 00:02:12,006 --> 00:02:14,509 in the image of the same rational creator 22 00:02:14,551 --> 00:02:17,220 who had built rationality and design 23 00:02:17,303 --> 00:02:19,264 and lawful order into the world. 24 00:02:19,347 --> 00:02:22,392 But according to another story, matter and energy interact 25 00:02:22,433 --> 00:02:24,602 and evolve in a completely mindless, 26 00:02:24,686 --> 00:02:26,771 undirected way and arrange themselves 27 00:02:26,855 --> 00:02:28,273 into everything we see around us. 28 00:02:31,943 --> 00:02:35,572 World famous atheist Richard Dawkins inspired millions 29 00:02:35,613 --> 00:02:38,074 by popularizing evolutionary biology. 30 00:02:38,157 --> 00:02:39,325 Once you've got life started, 31 00:02:39,409 --> 00:02:40,493 once natural selection, 32 00:02:40,577 --> 00:02:43,037 Darwinian natural selection has got going, 33 00:02:43,121 --> 00:02:48,167 then we pretty much understand the four billion year 34 00:02:48,251 --> 00:02:50,128 history of what's given rise to us 35 00:02:50,169 --> 00:02:52,171 and all other living creatures. 36 00:02:52,213 --> 00:02:53,590 And that's the story I want to tell you about. 37 00:02:53,673 --> 00:02:57,385 The things that we hold dear, including our very existence, 38 00:02:57,427 --> 00:02:59,387 are in a cosmic accident. 39 00:02:59,470 --> 00:03:02,807 It seems so obvious that if you've got a garden, 40 00:03:02,891 --> 00:03:04,434 there must be a gardener. 41 00:03:04,517 --> 00:03:08,521 But what science has now achieved is an emancipation 42 00:03:08,563 --> 00:03:13,651 from that impulse to attribute these things to a creator. 43 00:03:15,111 --> 00:03:16,654 And this view became popular 44 00:03:16,696 --> 00:03:20,491 because of scientific theories developed in the 19th century. 45 00:03:20,533 --> 00:03:25,204 Scientists like Pierre Laplace, Charles Darwin, 46 00:03:25,288 --> 00:03:28,583 and Thomas Henry Huxley each tried to explain events 47 00:03:28,666 --> 00:03:31,419 in the history of the universe, like the origin 48 00:03:31,502 --> 00:03:35,590 of the solar system, the origin of new forms of life, 49 00:03:35,673 --> 00:03:37,884 and even the origin of the very first life. 50 00:03:39,552 --> 00:03:41,554 By the end of the 19th century, 51 00:03:41,638 --> 00:03:44,724 a seamless story of the origin of nearly everything 52 00:03:44,807 --> 00:03:48,311 could be told as a consequence of slow, gradual, 53 00:03:48,353 --> 00:03:50,521 and purely naturalistic processes. 54 00:03:50,563 --> 00:03:51,981 By the 19th century, 55 00:03:52,023 --> 00:03:54,525 science had come to be associated 56 00:03:54,567 --> 00:03:57,362 with a larger philosophical idea called materialism, 57 00:03:57,403 --> 00:04:00,114 in which you just presuppose that the material 58 00:04:00,198 --> 00:04:01,199 universe is all there is. 59 00:04:02,408 --> 00:04:04,035 And that's why many leading scientists 60 00:04:04,077 --> 00:04:07,413 have claimed that science undermines belief in any intelligent 61 00:04:07,455 --> 00:04:10,583 or purposeful creator behind the universe. 62 00:04:10,667 --> 00:04:12,585 Yes or no to this statement. 63 00:04:12,669 --> 00:04:14,629 Science refutes God. 64 00:04:14,712 --> 00:04:19,467 500 years of science have demonstrated that God, 65 00:04:19,550 --> 00:04:22,470 that vague notion, is not likely. 66 00:04:22,512 --> 00:04:24,347 I have no problems if, 67 00:04:24,430 --> 00:04:26,265 as we probe the origins of things, 68 00:04:26,349 --> 00:04:27,934 we bump up into the bearded man. 69 00:04:28,017 --> 00:04:31,187 If that shows up, we're good to go. 70 00:04:31,229 --> 00:04:32,188 OK? 71 00:04:32,230 --> 00:04:33,231 Not a problem. 72 00:04:34,732 --> 00:04:36,401 There's just no evidence of it. 73 00:04:36,484 --> 00:04:37,652 How do you respond to that? 74 00:04:37,735 --> 00:04:40,071 It's not what Darwin thought in the 19th century. 75 00:04:40,113 --> 00:04:41,322 It's a new day in biology. 76 00:04:41,406 --> 00:04:43,616 Things are much more complex than people thought 77 00:04:43,700 --> 00:04:45,743 when they formulated these evolutionary ideas. 78 00:04:45,785 --> 00:04:47,078 There's a lot of people 79 00:04:47,120 --> 00:04:50,873 that adopt philosophies that mimic religions. 80 00:04:50,957 --> 00:04:52,959 If you can show that life arose 81 00:04:53,001 --> 00:04:56,504 by a completely undirected evolutionary process, 82 00:04:57,839 --> 00:04:58,673 you're going to be more inclined 83 00:04:58,756 --> 00:05:00,758 toward a more materialistic worldview. 84 00:05:00,842 --> 00:05:02,343 And that view, if true, 85 00:05:02,427 --> 00:05:05,346 has profound consequences for whether our lives 86 00:05:05,430 --> 00:05:07,515 have any ultimate meaning or significance. 87 00:05:08,683 --> 00:05:10,059 Have you thought about what happens 88 00:05:10,101 --> 00:05:11,686 when your life ends? 89 00:05:11,728 --> 00:05:13,104 Have I thought about what happens? 90 00:05:13,187 --> 00:05:14,230 Yeah. Of course, I die. 91 00:05:14,272 --> 00:05:15,189 Yeah. 92 00:05:15,273 --> 00:05:16,274 What do you think happens? 93 00:05:17,191 --> 00:05:18,943 I think I get buried or cremated. 94 00:05:18,985 --> 00:05:20,445 And that's it? 95 00:05:20,528 --> 00:05:21,612 Nothing after that. 96 00:05:21,696 --> 00:05:23,281 You have a brain which decays. 97 00:05:23,322 --> 00:05:24,741 There's just nothing. 98 00:05:25,825 --> 00:05:30,204 Here we are, like mites on a plum. 99 00:05:31,205 --> 00:05:33,374 And the plum is this little planet, 100 00:05:33,458 --> 00:05:37,712 and it goes around an insignificant local star. 101 00:05:37,795 --> 00:05:43,801 And that star is on the obscure outskirts of an ordinary galaxy, 102 00:05:43,885 --> 00:05:48,681 which contains 400 billion other stars. 103 00:05:48,765 --> 00:05:51,309 And this galaxy is just one of something 104 00:05:51,392 --> 00:05:54,228 like 100 billion other galaxies. 105 00:05:54,270 --> 00:05:57,648 So, the idea that we are central, 106 00:05:58,983 --> 00:06:05,531 that we are the reason there is a universe, is pathetic. 107 00:06:08,409 --> 00:06:09,994 This bleak view of the universe 108 00:06:10,036 --> 00:06:11,913 troubles many people. 109 00:06:11,996 --> 00:06:14,791 If we are the products of purely impersonal materialistic 110 00:06:14,874 --> 00:06:18,377 forces, and if eventually the universe will experience a heat 111 00:06:18,419 --> 00:06:22,090 death, leaving only cold, dark matter as scientists tell us, 112 00:06:22,173 --> 00:06:23,925 then there can't be any lasting meaning 113 00:06:24,008 --> 00:06:25,510 or purpose to our existence. 114 00:06:29,097 --> 00:06:30,306 But is that true? 115 00:06:30,389 --> 00:06:34,811 How likely is it that this panorama 116 00:06:34,894 --> 00:06:37,438 that appears to me every time I open my eyes 117 00:06:39,023 --> 00:06:42,693 does not have some very good reason for its existence? 118 00:06:44,237 --> 00:06:45,613 So, we have two great, 119 00:06:45,696 --> 00:06:48,449 competing stories about reality. 120 00:06:48,533 --> 00:06:51,577 One posits a purposeful creator behind the universe. 121 00:06:51,619 --> 00:06:54,038 The other envisions mindless processes 122 00:06:54,122 --> 00:06:55,623 producing everything we see. 123 00:06:57,375 --> 00:06:58,751 But which of these stories is true? 124 00:07:01,045 --> 00:07:02,463 What explains all of this? 125 00:07:06,175 --> 00:07:07,718 What's the story of everything? 126 00:07:20,606 --> 00:07:23,901 You can say, "Look, you can go back as far as you want, 127 00:07:23,985 --> 00:07:26,237 but somehow the stuff of the universe had to come 128 00:07:26,320 --> 00:07:29,115 from somewhere, and isn't that what God did?” 129 00:07:29,198 --> 00:07:31,784 But that's only true if the universe was created. 130 00:07:31,868 --> 00:07:34,120 If the universe was always here, 131 00:07:34,162 --> 00:07:36,622 if the universe was infinitely old, 132 00:07:36,664 --> 00:07:38,958 then there's nothing for a creator to do. 133 00:07:41,460 --> 00:07:44,297 How did the universe start? 134 00:07:48,009 --> 00:07:49,844 It's an ancient question that goes back all the way 135 00:07:49,886 --> 00:07:50,553 to the ancient Greeks. 136 00:07:50,636 --> 00:07:54,182 Has the universe always been here, or is it finite? 137 00:07:54,223 --> 00:07:56,809 A philosophical question that science began to address 138 00:07:56,893 --> 00:07:58,728 and answer in the beginning of the 20th century. 139 00:08:00,813 --> 00:08:02,523 And it starts with a relatively unknown 140 00:08:02,565 --> 00:08:04,942 astronomer named Vesto Slipher. 141 00:08:07,695 --> 00:08:09,822 Slipher is looking through telescopes, 142 00:08:09,906 --> 00:08:13,826 and he's looking at these nebular phenomena in the night sky. 143 00:08:16,662 --> 00:08:18,289 Fuzzy things that never focused 144 00:08:18,331 --> 00:08:19,665 in your telescope. 145 00:08:19,707 --> 00:08:21,167 But what Slipher was able 146 00:08:21,209 --> 00:08:23,669 to discover was that the light coming 147 00:08:23,711 --> 00:08:30,051 from these nebulae is shifted in the red direction 148 00:08:30,134 --> 00:08:31,719 of the electromagnetic spectrum. 149 00:08:32,845 --> 00:08:34,305 You shine light through a prism, 150 00:08:34,388 --> 00:08:37,808 it will separate into the different colors, red to violet. 151 00:08:37,892 --> 00:08:40,895 The red light corresponds to light with longer wavelengths. 152 00:08:42,480 --> 00:08:44,565 We call it redshift because light 153 00:08:44,649 --> 00:08:48,194 that has a longer wavelength tends to be more red in color. 154 00:08:48,277 --> 00:08:49,946 Let's say that you've got a firetruck going past you 155 00:08:49,987 --> 00:08:51,197 with its siren on. 156 00:08:51,280 --> 00:08:53,574 And as it goes past, the pitch changes. 157 00:08:53,699 --> 00:08:55,826 So [imitates siren]. 158 00:08:55,868 --> 00:08:57,328 As something is moving away from you, 159 00:08:57,370 --> 00:08:59,038 whatever kind of waves it's emitting, 160 00:08:59,121 --> 00:09:00,539 whether it's sound waves or light waves, 161 00:09:00,623 --> 00:09:01,624 are going to be stretched out. 162 00:09:02,959 --> 00:09:06,212 So, since the nebula that Slipher observed was shifted 163 00:09:06,254 --> 00:09:08,756 in the red direction, it meant that the nebula 164 00:09:08,798 --> 00:09:09,840 was moving away from us. 165 00:09:10,925 --> 00:09:12,802 Now, a nebula, at the time, 166 00:09:12,885 --> 00:09:15,972 was thought to be just a gas cloud within our galaxy. 167 00:09:17,306 --> 00:09:19,725 There were some astronomers who thought it might be at a galaxy 168 00:09:19,809 --> 00:09:22,270 beyond, but that was a debate. 169 00:09:22,311 --> 00:09:26,023 Then, in 1924, the debate was effectively settled 170 00:09:26,065 --> 00:09:29,193 when Edwin Hubble used some new techniques 171 00:09:29,235 --> 00:09:31,404 for measuring astronomical distances. 172 00:09:32,905 --> 00:09:36,409 Hubble started looking at the Andromeda nebula and realized 173 00:09:36,492 --> 00:09:40,413 that it was at least 900,000 light years away from us, 174 00:09:40,454 --> 00:09:41,998 and yet the distance across our whole 175 00:09:42,081 --> 00:09:44,417 galaxy was only 300,000 light years. 176 00:09:44,500 --> 00:09:47,795 And so, he realized that those nebulae 177 00:09:47,878 --> 00:09:49,130 must be separate galaxies. 178 00:09:56,137 --> 00:09:57,805 And then, as he was looking at the galaxies 179 00:09:57,888 --> 00:10:00,558 with this wonderful new dome telescope, 180 00:10:00,641 --> 00:10:03,352 he was also then able to see the beautiful structure, 181 00:10:04,478 --> 00:10:07,565 not just a gaseous smudge on a photographic plate. 182 00:10:08,858 --> 00:10:12,194 And Hubble then began to study not just the Andromeda Nebula, 183 00:10:12,236 --> 00:10:14,822 but many of these nebulae, i.e. 184 00:10:14,905 --> 00:10:18,659 galaxies, and discovered they were all shifted 185 00:10:18,743 --> 00:10:21,912 in the red direction, meaning they were all moving away from us. 186 00:10:23,998 --> 00:10:25,207 So, it looked as 187 00:10:25,291 --> 00:10:28,794 if space-time itself was expanding and stretching-- 188 00:10:28,878 --> 00:10:30,087 Like a balloon blowing up. 189 00:10:31,964 --> 00:10:33,841 There's a uniform expansion of almost 190 00:10:33,883 --> 00:10:35,551 all the galaxies moving outward. 191 00:10:39,680 --> 00:10:45,186 But what do you do when you mentally run 192 00:10:45,227 --> 00:10:46,896 that scenario in reverse? 193 00:10:51,817 --> 00:10:54,570 As we begin to wind that clock backwards 194 00:10:54,612 --> 00:10:56,864 and think of what the universe would have been like a thousand 195 00:10:56,947 --> 00:10:59,992 years ago, or a million years ago, or a billion years ago, 196 00:11:00,076 --> 00:11:02,828 or however far back you go, eventually you're gonna get 197 00:11:02,870 --> 00:11:05,539 to a place where all of that expanding material 198 00:11:05,664 --> 00:11:08,000 would have congealed in the same place, 199 00:11:08,084 --> 00:11:09,960 marking the beginning of the expansion. 200 00:11:15,883 --> 00:11:18,052 And arguably, the beginning of the universe itself. 201 00:11:20,805 --> 00:11:22,681 But there was something else. 202 00:11:22,765 --> 00:11:25,601 Several years earlier, the physicist Albert Einstein made 203 00:11:25,684 --> 00:11:28,437 a breakthrough in our understanding of gravity, 204 00:11:28,521 --> 00:11:31,690 one that also pointed to a beginning of the universe. 205 00:11:31,774 --> 00:11:34,777 But he found this implication of his theory so disturbing 206 00:11:34,819 --> 00:11:36,779 that he dismissed it out of hand. 207 00:11:39,532 --> 00:11:42,368 In 1915, he developed a revolutionary new theory 208 00:11:42,451 --> 00:11:45,246 of gravity called general relativity. 209 00:11:45,329 --> 00:11:47,164 The largest change in man's view 210 00:11:47,206 --> 00:11:49,417 of the universe since Isaac Newton. 211 00:11:49,500 --> 00:11:51,377 Nobody could foresee its implication. 212 00:11:52,878 --> 00:11:54,380 It implied that massive bodies 213 00:11:54,463 --> 00:11:56,799 in space literally curved space itself... 214 00:12:00,219 --> 00:12:02,513 in much the same way that a bowling ball changes the shape 215 00:12:02,555 --> 00:12:03,556 of a trampoline. 216 00:12:05,683 --> 00:12:07,518 The distortions of space due 217 00:12:07,560 --> 00:12:10,646 to a massive body like the sun shaped the course 218 00:12:10,688 --> 00:12:13,524 of lesser objects like the planets. 219 00:12:13,566 --> 00:12:15,443 That discovery was so powerful 220 00:12:15,526 --> 00:12:18,696 that Einstein went from being a nerdy physicist 221 00:12:18,737 --> 00:12:20,197 to a worldwide sensation. 222 00:12:21,365 --> 00:12:24,743 His theory not only changed our understanding 223 00:12:24,785 --> 00:12:26,370 of the present structure of the universe, 224 00:12:27,496 --> 00:12:30,291 it also had profound implications for a long-standing question 225 00:12:30,374 --> 00:12:31,959 about the origin of the universe. 226 00:12:34,420 --> 00:12:35,671 Einstein's theory implied 227 00:12:35,754 --> 00:12:37,381 that in addition to gravity, there 228 00:12:37,465 --> 00:12:39,717 must be an outward pushing force. 229 00:12:46,348 --> 00:12:48,476 Because if gravity were the only force 230 00:12:48,517 --> 00:12:50,769 in the universe, everything would have congealed 231 00:12:50,853 --> 00:12:52,021 into one big black hole. 232 00:12:54,565 --> 00:12:56,609 But we don't live in that kind of universe. 233 00:12:56,692 --> 00:12:59,069 We live in a universe where there is empty space 234 00:12:59,153 --> 00:13:00,279 between massive bodies. 235 00:13:02,031 --> 00:13:04,825 There must be some sort of anti-gravity force 236 00:13:04,909 --> 00:13:07,244 or some sort of outward pushing force 237 00:13:07,286 --> 00:13:08,829 that creates the empty space. 238 00:13:11,040 --> 00:13:12,249 He struggled and struggled with it. 239 00:13:12,291 --> 00:13:14,418 And finally, he said, "I'm going to need to put 240 00:13:14,460 --> 00:13:19,298 in an anti-gravity term into my general equation of relativity,” 241 00:13:19,340 --> 00:13:21,717 and he called it the cosmological constant. 242 00:13:21,800 --> 00:13:23,260 And physicists today accept 243 00:13:23,344 --> 00:13:25,012 that there is a cosmological constant. 244 00:13:25,054 --> 00:13:27,097 There is an outward pushing force. 245 00:13:27,181 --> 00:13:28,682 But Einstein made a further move. 246 00:13:31,268 --> 00:13:33,687 He simply chose an arbitrary value 247 00:13:33,729 --> 00:13:35,231 for this outward pushing force, one 248 00:13:35,272 --> 00:13:38,442 that was exactly balanced to the force of gravity, 249 00:13:38,526 --> 00:13:42,363 to suggest that the universe was static, 250 00:13:42,446 --> 00:13:44,532 neither expanding nor contracting, 251 00:13:44,573 --> 00:13:47,826 and is therefore eternal and self-existent. 252 00:13:51,455 --> 00:13:54,291 However, theoretical physicists began 253 00:13:54,333 --> 00:13:56,293 to work with Einstein's equations. 254 00:14:01,590 --> 00:14:04,593 And one of the physicists was the Belgian priest, 255 00:14:04,677 --> 00:14:05,678 Georges Lemaître. 256 00:14:09,265 --> 00:14:12,768 They realized that the most natural implication 257 00:14:12,810 --> 00:14:16,438 of Einstein's equations was that the universe was expanding. 258 00:14:18,315 --> 00:14:21,819 But Lemaître was also aware of the data coming 259 00:14:21,902 --> 00:14:23,654 from Vesto Slipher about the red shift. 260 00:14:26,323 --> 00:14:29,702 So, Lemaître pulled those two lines of evidence together 261 00:14:29,785 --> 00:14:32,496 and formulated what is now known as the Big Bang Theory. 262 00:14:32,538 --> 00:14:43,215 Einstein, for various philosophical 263 00:14:43,257 --> 00:14:44,800 or theoretical reasons, was trying 264 00:14:44,883 --> 00:14:47,553 to avoid the implications of his theory. 265 00:14:50,848 --> 00:14:53,726 But Lemaître and Einstein met 266 00:14:53,809 --> 00:14:55,144 at a conference in 1927. 267 00:14:55,227 --> 00:14:58,814 They had shared a taxi cab ride together, 268 00:14:58,897 --> 00:15:01,650 where Lemaître apparently informed Einstein 269 00:15:01,692 --> 00:15:04,320 about the redshift evidence that the universe was actually 270 00:15:04,361 --> 00:15:08,365 expanding despite Einstein's attempt to depict it as static. 271 00:15:10,701 --> 00:15:14,913 Einstein tells him that your mathematics is impeccable, 272 00:15:15,039 --> 00:15:17,207 but your physical intuition is abominable. 273 00:15:18,542 --> 00:15:21,754 Einstein accused him of formulating this, deductively drawing it 274 00:15:21,795 --> 00:15:23,881 from the Christian doctrine of creation rather than 275 00:15:23,964 --> 00:15:25,174 from the evidence. 276 00:15:25,257 --> 00:15:27,968 Lemaître bristled at that, showed, no, actually, 277 00:15:28,052 --> 00:15:29,678 I have the evidence on my side. 278 00:15:29,762 --> 00:15:31,138 The universe is expanding. 279 00:15:31,180 --> 00:15:34,391 And your equations, when solved, point to a beginning. 280 00:15:37,019 --> 00:15:39,855 And so, in 1931, Einstein went out 281 00:15:39,897 --> 00:15:42,066 to the Hooker Telescope at Mount Wilson... 282 00:15:45,361 --> 00:15:49,281 and viewed the evidence of the expanding universe 283 00:15:49,365 --> 00:15:50,449 through Hubble's telescope. 284 00:15:59,500 --> 00:16:01,627 And then, a week or two later, he does an interview 285 00:16:01,669 --> 00:16:04,129 with the New York Times and acknowledges that Hubble 286 00:16:04,213 --> 00:16:06,173 and his colleague Humason had shown 287 00:16:06,215 --> 00:16:08,133 that the universe is not static. 288 00:16:08,175 --> 00:16:11,512 And later, he acknowledged that his fine-tuning 289 00:16:11,553 --> 00:16:13,013 of the cosmological constant... 290 00:16:14,932 --> 00:16:16,892 was the greatest blunder of his scientific career. 291 00:16:27,111 --> 00:16:31,365 From roughly the 1920s till the 60s, 292 00:16:31,448 --> 00:16:33,242 astrophysics proceeded with a lot 293 00:16:33,325 --> 00:16:36,203 of brilliant people doing a lot of great work, 294 00:16:36,286 --> 00:16:40,916 but a lot of it was focused on avoiding the notion 295 00:16:40,999 --> 00:16:41,959 of a beginning. 296 00:16:42,000 --> 00:16:46,547 That view of the universe was debated, 297 00:16:46,630 --> 00:16:49,133 and many people argued against it. 298 00:16:51,051 --> 00:16:56,056 Fred Hoyle was a famous physicist who said, "I'm a Democritean.” 299 00:16:56,098 --> 00:16:58,976 He said, "I believe nothing comes from nothing.” 300 00:16:59,059 --> 00:17:02,020 His argument was there can't be a beginning to the universe 301 00:17:02,104 --> 00:17:04,314 because that would be something coming from nothing. 302 00:17:04,398 --> 00:17:06,358 I don't like the idea 303 00:17:06,442 --> 00:17:14,158 that something is dependent on a cause that I can never verify. 304 00:17:14,199 --> 00:17:15,784 Hoyle was, in fact, 305 00:17:15,868 --> 00:17:19,663 so opposed to the notion of a beginning 306 00:17:19,747 --> 00:17:21,457 that I think he was the one who coined the name 307 00:17:21,540 --> 00:17:23,959 Big Bang as a sort of a derogatory name. 308 00:17:24,042 --> 00:17:26,670 Fred Hoyle, who was, for much of his life, 309 00:17:26,712 --> 00:17:30,048 a secular atheist, he believed that cosmologists 310 00:17:30,090 --> 00:17:34,887 were being too influenced by the Genesis 1:1 narrative. 311 00:17:35,929 --> 00:17:37,306 And so, he formulates another model. 312 00:17:37,347 --> 00:17:38,348 It's called the steady state. 313 00:17:39,391 --> 00:17:41,268 He imagines there's always been matter, 314 00:17:41,310 --> 00:17:44,730 there's always been energy, there's always been space and time. 315 00:17:44,813 --> 00:17:46,899 The universe is infinitely old and 316 00:17:46,982 --> 00:17:48,567 has been creating matter continually. 317 00:17:49,860 --> 00:17:51,570 So, in the mid-1900s, 318 00:17:51,653 --> 00:17:55,866 there was really a battle between two rival cosmologies. 319 00:17:55,908 --> 00:17:58,076 Both theories make predictions, 320 00:17:58,118 --> 00:18:01,914 and Hoyle's prediction was that no matter how far back 321 00:18:01,997 --> 00:18:04,583 in time you look, it will look exactly the same. 322 00:18:05,834 --> 00:18:09,004 If the universe was eternal in time and space, 323 00:18:09,087 --> 00:18:11,048 then there was no beginning and no time 324 00:18:11,131 --> 00:18:14,259 when all of the galactic material would have been concentrated 325 00:18:14,301 --> 00:18:16,929 into a single, hot, dense point. 326 00:18:16,970 --> 00:18:18,472 But the Big Bang predicts that there 327 00:18:18,514 --> 00:18:19,640 would have been such a point. 328 00:18:21,683 --> 00:18:24,019 When that Big Bang exploded, 329 00:18:24,102 --> 00:18:26,814 the universe was in a very dense and hot state. 330 00:18:32,861 --> 00:18:34,613 And as it got bigger, it cooled. 331 00:18:35,823 --> 00:18:39,660 And when it cooled far enough, light was allowed to escape. 332 00:18:42,663 --> 00:18:45,958 So, if the Big Bang theory was true, 333 00:18:45,999 --> 00:18:48,544 there should be some evidence of this light in the form 334 00:18:48,627 --> 00:18:53,382 of leftover radiation spread throughout the universe. 335 00:18:53,465 --> 00:18:55,134 You can think of it as a glow, 336 00:18:55,175 --> 00:18:58,512 as a fossil left over from the creation process. 337 00:19:00,514 --> 00:19:02,099 People looked for this radiation, 338 00:19:02,182 --> 00:19:03,183 couldn't find it. 339 00:19:04,768 --> 00:19:08,230 But then, two Bell Labs physicists were trying 340 00:19:08,313 --> 00:19:12,651 to create a microwave link from the ground to a satellite. 341 00:19:14,361 --> 00:19:17,531 They'd point this big horn antenna at the satellite 342 00:19:17,573 --> 00:19:18,574 and record the data. 343 00:19:21,660 --> 00:19:23,662 Well, they were getting noise and static 344 00:19:23,745 --> 00:19:24,788 and couldn't explain it. 345 00:19:24,913 --> 00:19:26,498 And wherever they pointed their horn antenna, 346 00:19:26,540 --> 00:19:28,000 they got the static, and they said, 347 00:19:28,041 --> 00:19:29,543 "There's something wrong with our antenna.” 348 00:19:31,169 --> 00:19:33,005 In their desperation to figure out the source 349 00:19:33,046 --> 00:19:36,508 of this signal, they thought it might have come 350 00:19:36,550 --> 00:19:39,928 from pigeon droppings that were on this antenna. 351 00:19:40,012 --> 00:19:41,388 They're scraping it off. 352 00:19:41,471 --> 00:19:42,556 Nothing works. 353 00:19:42,598 --> 00:19:45,726 And then, one of them went to a seminar down 354 00:19:45,767 --> 00:19:48,353 at Princeton by a physicist named Robert Dickey. 355 00:19:48,437 --> 00:19:50,063 And Robert Dickey said, "We're looking 356 00:19:50,105 --> 00:19:53,358 for the glow of that Big Bang radiation. 357 00:19:53,442 --> 00:19:56,695 And today, it would have cooled down into the microwave. 358 00:19:56,778 --> 00:19:59,823 That would be the wavelength of light corresponding to that.” 359 00:20:01,783 --> 00:20:03,452 Penzias and Wilson looked at each other and said, 360 00:20:03,535 --> 00:20:04,536 "I think we found it.” 361 00:20:06,538 --> 00:20:09,541 They wrote up a paper that they had discovered the radiation 362 00:20:09,583 --> 00:20:13,128 left over from the Big Bang, and it was such a sensation. 363 00:20:13,211 --> 00:20:16,423 They got the Nobel Prize, and I would say at that point, 364 00:20:16,465 --> 00:20:19,009 90-some percent of the physicists all agreed 365 00:20:19,092 --> 00:20:21,386 that the Big Bang model was the working one. 366 00:20:21,428 --> 00:20:22,429 Hoyle never did. 367 00:20:23,472 --> 00:20:25,974 He insisted that the steady-state model was better, 368 00:20:26,058 --> 00:20:27,976 and he was going to get it fixed one of these days. 369 00:20:29,561 --> 00:20:33,440 We scientists have our predispositions. 370 00:20:33,523 --> 00:20:36,151 And in this case, the predisposition was to avoid a beginning 371 00:20:36,193 --> 00:20:37,444 to the universe. 372 00:20:37,527 --> 00:20:40,572 And that has been going on for about a century now. 373 00:20:40,656 --> 00:20:46,745 And yet it's as if, you know, we are being forced to accept, 374 00:20:46,828 --> 00:20:51,541 by the observations, that the universe is evolving 375 00:20:51,625 --> 00:20:52,626 and it had a beginning. 376 00:21:00,175 --> 00:21:01,969 Now, in the 1960s, 377 00:21:02,010 --> 00:21:05,889 this whole question of the implication of general relativity 378 00:21:05,973 --> 00:21:08,058 for the beginning of the universe was revisited. 379 00:21:11,728 --> 00:21:14,314 And it starts with Stephen Hawking. 380 00:21:16,775 --> 00:21:19,236 He's studying in Cambridge. 381 00:21:19,278 --> 00:21:23,115 And in the middle of the PhD, he is diagnosed with ALS, 382 00:21:23,156 --> 00:21:24,157 Lou Gehrig's disease. 383 00:21:25,534 --> 00:21:28,286 Debilitating neurological disorder. 384 00:21:28,328 --> 00:21:33,458 He's so discouraged that he might just quit the PhD, 385 00:21:33,500 --> 00:21:37,421 but he's encouraged by people near him to press on, and he does. 386 00:21:39,006 --> 00:21:40,549 Quite a heroic story, actually. 387 00:21:43,552 --> 00:21:45,429 He's working on black hole physics. 388 00:21:50,017 --> 00:21:54,062 Black holes, extremely massive, 389 00:21:54,146 --> 00:21:58,400 but compressed down into an unimaginably small amount of space. 390 00:22:00,068 --> 00:22:03,780 These things are warping space and time in ways 391 00:22:03,822 --> 00:22:05,741 that you can't even imagine. 392 00:22:05,824 --> 00:22:07,659 It's causing space around that matter 393 00:22:07,743 --> 00:22:10,328 to curve so tightly that even light can't get out. 394 00:22:12,414 --> 00:22:15,333 But then, Hawking's thinking about the history 395 00:22:15,417 --> 00:22:17,753 and origin of the universe itself. 396 00:22:17,836 --> 00:22:20,464 He realizes that if the universe is expanding outward 397 00:22:20,505 --> 00:22:22,132 in the forward direction of time, 398 00:22:22,215 --> 00:22:24,843 then matter is getting more and more spread out. 399 00:22:28,221 --> 00:22:29,139 And he starts thinking about, well, 400 00:22:29,222 --> 00:22:30,807 what happens in the reverse direction of time? 401 00:22:30,891 --> 00:22:35,729 If the matter is more diffused in the forward direction of time, 402 00:22:35,771 --> 00:22:37,439 it means it's more concentrated in the reverse 403 00:22:37,481 --> 00:22:38,482 direction of time. 404 00:22:39,858 --> 00:22:42,360 Then, according to Einstein's theory of general relativity, 405 00:22:42,444 --> 00:22:45,572 the space around matter should get more tightly curved. 406 00:22:45,655 --> 00:22:49,159 So, as you go back in time, as matter gets more densely 407 00:22:49,201 --> 00:22:52,454 concentrated, the space gets more tightly curved, 408 00:22:52,537 --> 00:22:55,457 and you eventually get to a limiting point 409 00:22:55,540 --> 00:22:58,043 where the matter gets so densely concentrated 410 00:22:58,126 --> 00:22:59,878 that the space gets so tightly curved 411 00:22:59,920 --> 00:23:01,838 that eventually you can't go back any further. 412 00:23:03,715 --> 00:23:06,301 And this, Hawking calls the singularity, 413 00:23:06,384 --> 00:23:09,805 a point of infinite density and infinitely tight curvature. 414 00:23:20,023 --> 00:23:24,277 In his PhD thesis in 1966, Hawking presents 415 00:23:24,361 --> 00:23:26,655 an initial defense of that idea. 416 00:23:26,696 --> 00:23:29,741 He gets incredible praise from his examiners. 417 00:23:29,825 --> 00:23:32,410 The idea of a space-time singularity, 418 00:23:32,452 --> 00:23:36,206 a beginning to the universe, that's a mind-blowing conclusion. 419 00:23:41,086 --> 00:23:42,087 But there's a problem. 420 00:23:44,214 --> 00:23:46,174 As you're going back toward the very beginning 421 00:23:46,258 --> 00:23:49,386 of time, the volume of the universe is going to zero. 422 00:23:51,638 --> 00:23:53,265 There's no space to put anything. 423 00:23:55,016 --> 00:24:00,897 Zero size is not something that can exist in space and time. 424 00:24:01,940 --> 00:24:08,113 Rather, the singularity is the point outside of space and time. 425 00:24:08,196 --> 00:24:10,157 It's not in space and time. 426 00:24:16,079 --> 00:24:17,956 Before the beginning of time, 427 00:24:17,998 --> 00:24:19,291 there's no universe. 428 00:24:19,374 --> 00:24:22,836 The universe comes into existence out of the singularity. 429 00:24:22,919 --> 00:24:23,753 There is no matter. 430 00:24:23,795 --> 00:24:24,546 There is no space. 431 00:24:24,629 --> 00:24:25,255 There is no time. 432 00:24:25,297 --> 00:24:26,006 There is no energy. 433 00:24:26,089 --> 00:24:28,425 There's no material stuff there to do the causing. 434 00:24:37,058 --> 00:24:39,227 Physicist Robert Dickey said, 435 00:24:39,311 --> 00:24:42,731 "An infinite universe would relieve us of the necessity 436 00:24:42,772 --> 00:24:45,066 of understanding the origin of matter 437 00:24:45,108 --> 00:24:47,944 at any finite time in the past.” 438 00:24:48,028 --> 00:24:49,654 Notice that verb, relieve. 439 00:24:49,738 --> 00:24:51,156 That's not a scientific term. 440 00:24:51,198 --> 00:24:52,199 What does Dickey mean? 441 00:24:53,450 --> 00:24:55,660 Well, if the universe is eternal and infinite, 442 00:24:56,870 --> 00:24:59,915 then we don't even have to ask the question where it came from. 443 00:24:59,998 --> 00:25:03,543 So, if an infinite universe relieves us of the necessity, 444 00:25:03,627 --> 00:25:05,045 what does a finite universe do? 445 00:25:11,760 --> 00:25:14,804 We now know the universe began 446 00:25:14,888 --> 00:25:20,685 to exist finitely long ago, but whatever begins 447 00:25:20,769 --> 00:25:24,314 to exist is caused to exist by something else. 448 00:25:26,316 --> 00:25:28,109 Now, because we're talking about the origin 449 00:25:28,151 --> 00:25:31,905 of the universe itself, by which we mean the origin of matter, 450 00:25:31,988 --> 00:25:35,200 energy, space, and time, any entity capable 451 00:25:35,242 --> 00:25:39,204 of causing the universe to come into existence must be external 452 00:25:39,246 --> 00:25:42,457 to or separate from the universe itself. 453 00:25:42,540 --> 00:25:44,960 It must exist independently of matter 454 00:25:45,043 --> 00:25:46,628 and transcend space and time. 455 00:25:48,546 --> 00:25:50,757 And so, whatever explains the finite 456 00:25:50,840 --> 00:25:53,385 physical universe must be itself non-physical. 457 00:25:53,426 --> 00:25:56,012 Whatever explains the finite material 458 00:25:56,096 --> 00:25:58,765 universe must itself be immaterial... 459 00:26:00,475 --> 00:26:06,273 to get in this way to the philosophical stopping point 460 00:26:06,356 --> 00:26:07,357 of the first cause. 461 00:26:17,450 --> 00:26:18,910 I first witnessed astronomers 462 00:26:18,994 --> 00:26:22,414 and cosmologists wrestling with this problem of the first cause 463 00:26:22,497 --> 00:26:24,582 at a conference early in my career. 464 00:26:24,666 --> 00:26:26,584 It may not be the ultimate truth. 465 00:26:26,668 --> 00:26:28,128 At that conference, 466 00:26:28,211 --> 00:26:31,464 I encountered the work of a great 467 00:26:31,506 --> 00:26:34,384 cosmologist named Allan Sandage. 468 00:26:34,467 --> 00:26:36,553 He was well known for being a hard-bitten 469 00:26:36,636 --> 00:26:38,555 scientific materialist. 470 00:26:38,638 --> 00:26:40,682 But he'd worked closely with Edwin Hubble 471 00:26:40,724 --> 00:26:43,351 on verifying the expansion of the universe 472 00:26:43,435 --> 00:26:44,561 in all quadrants of the sky. 473 00:26:46,354 --> 00:26:48,898 And at this conference, he announced 474 00:26:48,940 --> 00:26:52,402 that he had come to a theistic belief, 475 00:26:52,485 --> 00:26:56,948 not in spite of, but because of the scientific discoveries 476 00:26:56,990 --> 00:27:00,577 concerning the origin of the universe and its fine tuning. 477 00:27:00,618 --> 00:27:03,787 And I can remember him looking into the camera and saying-- 478 00:27:03,788 --> 00:27:06,708 Here is evidence for what can only 479 00:27:06,791 --> 00:27:09,544 be described as a supernatural event. 480 00:27:09,627 --> 00:27:12,464 Super natural event. 481 00:27:12,505 --> 00:27:13,882 And there was a kind of a beat, a pause 482 00:27:13,965 --> 00:27:15,717 between the words super and natural. 483 00:27:15,800 --> 00:27:17,802 There's no way that this could have been 484 00:27:17,844 --> 00:27:21,431 predicted within the realm of physics as we know it. 485 00:27:30,273 --> 00:27:31,775 Another astronomer at the conference 486 00:27:31,816 --> 00:27:34,277 who was particularly distressed by the problem 487 00:27:34,361 --> 00:27:36,571 of the first cause was Robert Jastrow. 488 00:27:36,654 --> 00:27:39,949 National Aeronautics and Space Administration. 489 00:27:39,991 --> 00:27:41,326 Though he was an agnostic, 490 00:27:41,409 --> 00:27:43,328 he had recently published a book called 491 00:27:43,411 --> 00:27:44,579 "God and the Astronomers". 492 00:27:46,289 --> 00:27:47,916 Later, he did a number of interviews 493 00:27:47,999 --> 00:27:50,168 about the conclusion of his book. 494 00:27:50,210 --> 00:27:51,503 One of the things that interests me 495 00:27:51,586 --> 00:27:54,631 that I find most puzzling in this astronomy we've 496 00:27:54,714 --> 00:27:57,550 been discussing is the fact that there was a beginning. 497 00:27:59,719 --> 00:28:00,929 The mystery of creation. 498 00:28:03,348 --> 00:28:05,100 If there were no beginning, we wouldn't have to ask 499 00:28:05,141 --> 00:28:06,434 what happened before the beginning. 500 00:28:07,769 --> 00:28:10,522 And we wouldn't have to worry about who created the universe. 501 00:28:10,563 --> 00:28:11,815 But the fact the universe sprang 502 00:28:11,898 --> 00:28:15,485 into being at a definite moment seems to me theological... 503 00:28:16,820 --> 00:28:19,697 and nothing that could be answered within science. 504 00:28:19,739 --> 00:28:22,117 There always has to be a cause for any effect, 505 00:28:22,200 --> 00:28:26,663 and then that cause becomes an effect of a cause underlying it. 506 00:28:26,704 --> 00:28:28,164 But in the case of the Big Bang, 507 00:28:28,206 --> 00:28:30,542 that calls for an uncreated creator, 508 00:28:30,625 --> 00:28:32,794 and that would answer to some people's definition of a god. 509 00:28:35,255 --> 00:28:37,173 I'm an agnostic, not a believer, 510 00:28:37,257 --> 00:28:38,258 but not an atheist. 511 00:28:40,885 --> 00:28:45,974 Suppose you try to get away from the theological explanation. 512 00:28:46,057 --> 00:28:48,476 Is there something else that we can imagine 513 00:28:48,560 --> 00:28:51,729 that would lay these questions to rest? 514 00:28:51,813 --> 00:28:52,814 Some-- 515 00:28:53,982 --> 00:28:55,024 I can't see it. 516 00:29:01,990 --> 00:29:07,370 The last paragraph of Jastrow's book says 517 00:29:07,412 --> 00:29:09,914 that the natural scientist or the physicist 518 00:29:09,956 --> 00:29:11,791 has scaled the peak of ignorance. 519 00:29:11,875 --> 00:29:14,377 As he pulls himself over the last boulder, 520 00:29:14,419 --> 00:29:16,671 he finds the philosophers and the theologians 521 00:29:16,754 --> 00:29:17,922 sitting there waiting for him. 522 00:29:19,549 --> 00:29:23,303 The point Jastrow is making is no scientist wanted there 523 00:29:23,386 --> 00:29:25,180 to be a creation to the universe. 524 00:29:25,263 --> 00:29:27,015 He wanted it to be eternal. 525 00:29:27,098 --> 00:29:30,018 But that was inevitably where science was taking us 526 00:29:30,059 --> 00:29:32,395 to, that point where we had to acknowledge 527 00:29:32,479 --> 00:29:33,480 there was a beginning. 528 00:29:42,614 --> 00:29:44,699 Hawking proves the singularity, 529 00:29:45,867 --> 00:29:48,453 doesn't much like its implications, 530 00:29:48,495 --> 00:29:51,247 because it seems to point to a kind of creation event. 531 00:29:51,289 --> 00:29:54,792 So, he spent much of the rest of his career attempting 532 00:29:54,876 --> 00:29:58,213 to circumvent the conclusion of his own proof. 533 00:29:58,296 --> 00:30:00,882 And in the process, he developed these quantum 534 00:30:00,965 --> 00:30:04,010 cosmological ideas through a tiny loophole. 535 00:30:07,472 --> 00:30:09,224 Hawking and other physicists recognize 536 00:30:09,265 --> 00:30:14,646 that they can only back extrapolate to almost the singularity. 537 00:30:14,729 --> 00:30:18,024 They can get to 1E-43 of a second 538 00:30:18,107 --> 00:30:19,275 after the beginning of the universe. 539 00:30:20,735 --> 00:30:23,279 To say it's a blink of an eye is a huge exaggeration. 540 00:30:25,490 --> 00:30:27,534 Before that time, they thought gravity might have worked 541 00:30:27,575 --> 00:30:30,370 differently, according to quantum mechanics, 542 00:30:30,453 --> 00:30:34,374 the physics that applies to the tiny subatomic realm. 543 00:30:34,457 --> 00:30:38,044 So, they attempted to develop an alternative cosmological model 544 00:30:38,127 --> 00:30:40,505 that they called quantum cosmology. 545 00:30:43,758 --> 00:30:48,096 The hope among some of those cosmologists is that this model 546 00:30:48,179 --> 00:30:51,558 would eliminate the need for a beginning of the universe 547 00:30:51,641 --> 00:30:54,269 or would somehow explain the origin of the universe 548 00:30:54,310 --> 00:30:57,272 without any need to posit an external creator. 549 00:31:00,900 --> 00:31:03,778 I can recall Stephen Hawking at Cambridge, 550 00:31:03,820 --> 00:31:07,198 just when the beginnings of Motor Neurone Disease 551 00:31:07,240 --> 00:31:11,786 were being seen in his difficulty in walking. 552 00:31:11,869 --> 00:31:16,916 When I was given a pre- publication edition of his book, 553 00:31:17,000 --> 00:31:21,879 "The Grand Design", I was quite amazed to come 554 00:31:21,963 --> 00:31:24,757 across what appears to be a central statement. 555 00:31:26,509 --> 00:31:30,096 Because there are laws, such as gravity, 556 00:31:30,138 --> 00:31:34,892 the universe can and will create itself from nothing. 557 00:31:37,979 --> 00:31:40,315 I had an immediate visceral reaction. 558 00:31:40,356 --> 00:31:42,567 What could that possibly mean? 559 00:31:44,402 --> 00:31:48,114 Because there is a law such as gravity, 560 00:31:48,197 --> 00:31:50,408 that is because there is something, 561 00:31:50,450 --> 00:31:53,119 the universe can create itself from nothing. 562 00:31:53,202 --> 00:31:56,623 And that appears to me to be a flat contradiction. 563 00:31:56,706 --> 00:31:59,375 Nothing is certainly not nothing. 564 00:32:00,793 --> 00:32:02,045 Hawking is saying that the universe 565 00:32:02,086 --> 00:32:04,547 has come out of some sort of pre-existing laws 566 00:32:04,631 --> 00:32:07,675 of physics that are expressed as mathematical equations. 567 00:32:10,053 --> 00:32:14,015 The implication of this is that out of math comes matter, 568 00:32:14,057 --> 00:32:15,183 space, time, and energy. 569 00:32:18,186 --> 00:32:20,563 But these mathematical equations don't describe anything 570 00:32:20,647 --> 00:32:22,899 yet because there is no universe yet to describe. 571 00:32:24,859 --> 00:32:26,903 Math has no causal power by itself. 572 00:32:29,989 --> 00:32:32,533 And one of the developers of quantum cosmology, 573 00:32:32,575 --> 00:32:35,203 the Russian physicist Alexander Volinkin, 574 00:32:35,286 --> 00:32:38,748 has reflected deeply on this kind of paradoxical result. 575 00:32:38,790 --> 00:32:41,250 He says, "In the absence of space, time, 576 00:32:41,292 --> 00:32:45,129 and matter, what tablets could these laws be written upon?” 577 00:32:46,798 --> 00:32:49,092 Hawking was sensitive to the same concern. 578 00:32:49,175 --> 00:32:52,720 He said, "What is it that breathes fire into the equations 579 00:32:52,804 --> 00:32:54,597 and makes a universe for them to describe?” 580 00:32:56,057 --> 00:32:59,977 In our experience, math is conceptual. 581 00:33:00,061 --> 00:33:01,604 It exists in a mind. 582 00:33:01,688 --> 00:33:05,024 So, if we're saying the material universe came out of a set 583 00:33:05,108 --> 00:33:07,777 of mathematical equations, are we really saying 584 00:33:07,860 --> 00:33:10,279 that the material universe came out of a mind? 585 00:33:27,672 --> 00:33:30,717 The basic idea of fine-tuning is that the universe 586 00:33:30,758 --> 00:33:34,512 is just so, that its properties, the initial conditions, 587 00:33:34,554 --> 00:33:38,891 the so-called constants of physics, the laws of nature, 588 00:33:38,933 --> 00:33:41,936 rest on a razor's edge so that if they were slightly different 589 00:33:42,019 --> 00:33:43,521 than they are in the actual universe, 590 00:33:44,731 --> 00:33:46,107 the universe would not be habitable. 591 00:33:46,149 --> 00:33:47,984 That is, it would not be compatible with life. 592 00:33:48,067 --> 00:33:50,153 Physicist Sir John Polkinghorne used 593 00:33:50,194 --> 00:33:52,280 to have an excellent visual illustration 594 00:33:52,321 --> 00:33:54,240 to convey the idea of the fine-tuning. 595 00:33:54,323 --> 00:33:56,576 He used to ask people in the audience to imagine 596 00:33:56,659 --> 00:33:58,995 that they were on a spaceship that had docked 597 00:33:59,036 --> 00:34:00,163 at a space station. 598 00:34:01,414 --> 00:34:03,875 And upon entrance to the space station, 599 00:34:03,958 --> 00:34:05,918 they discovered there was a great room 600 00:34:06,002 --> 00:34:09,380 with a huge universe-creating machine inside. 601 00:34:09,464 --> 00:34:11,924 And it had dials and knobs and sliders, 602 00:34:11,966 --> 00:34:15,094 each representing one of the fundamental physical parameters, 603 00:34:15,178 --> 00:34:19,932 where each one of the dials was set to a very precise value. 604 00:34:19,974 --> 00:34:21,559 Imagine what would happen if you changed one 605 00:34:21,642 --> 00:34:22,977 of the dials one click this way or 606 00:34:23,060 --> 00:34:25,480 that, or move a slider one notch this way or 607 00:34:25,563 --> 00:34:28,858 that, that life in the universe would suddenly 608 00:34:28,900 --> 00:34:29,901 become impossible. 609 00:34:32,487 --> 00:34:35,406 But it was none other than Fred Hoyle who first discovered 610 00:34:35,448 --> 00:34:38,076 that our universe is actually fine-tuned for life. 611 00:34:46,250 --> 00:34:50,254 I'm going to tell you today a story which, 612 00:34:50,338 --> 00:34:53,758 if you hear it, may seem very strange to you. 613 00:34:55,009 --> 00:34:56,636 Hoyle was trying to show, 614 00:34:56,719 --> 00:34:59,514 as part of his work on the steady-state cosmology, 615 00:34:59,555 --> 00:35:01,557 where carbon could have come from. 616 00:35:02,683 --> 00:35:05,686 And certainly it would have seemed strange to me, 617 00:35:05,770 --> 00:35:09,065 some 20 years ago, when the path 618 00:35:09,106 --> 00:35:13,569 which led to this work began to be followed. 619 00:35:15,571 --> 00:35:18,991 When he himself made a discovery 620 00:35:19,075 --> 00:35:21,452 that shook his personal philosophy. 621 00:35:22,954 --> 00:35:25,456 So, let me begin then without more ado. 622 00:35:26,707 --> 00:35:28,543 So, Hoyle is trying to explain the abundance 623 00:35:28,626 --> 00:35:30,962 of carbon in the universe because he recognized 624 00:35:31,003 --> 00:35:33,005 that you needed carbon to build life, 625 00:35:33,047 --> 00:35:34,507 but he can't figure out for the life 626 00:35:34,549 --> 00:35:36,300 of him how it could have been built. 627 00:35:36,342 --> 00:35:39,178 Hoyle reasoned that the Big Bang couldn't do it, 628 00:35:39,262 --> 00:35:41,639 the Quasi-Steady State universe couldn't do it, 629 00:35:41,681 --> 00:35:43,224 and the only other laboratories for doing 630 00:35:43,307 --> 00:35:45,726 so were in the bellies of stars. 631 00:35:51,941 --> 00:35:55,278 The understanding now is that all of the elements 632 00:35:55,361 --> 00:35:58,823 that we have, carbon, oxygen, so on, were synthesized 633 00:35:58,906 --> 00:35:59,907 inside of stars. 634 00:36:03,202 --> 00:36:04,912 When that star exploded, goes supernova, 635 00:36:04,996 --> 00:36:07,456 then that gets spread throughout the universe. 636 00:36:07,498 --> 00:36:09,542 Then, that gets to be re-accumulated back 637 00:36:09,625 --> 00:36:11,043 into new stars and planets. 638 00:36:13,921 --> 00:36:15,381 He developed numerous ideas 639 00:36:15,464 --> 00:36:19,218 about how carbon might form from simpler atoms inside stars. 640 00:36:19,302 --> 00:36:21,512 But for various reasons, none of them would work. 641 00:36:22,847 --> 00:36:25,725 But then, he comes up with a theory that works with the physics. 642 00:36:25,766 --> 00:36:28,227 His theory envisions two elements, 643 00:36:28,269 --> 00:36:30,688 beryllium with an atomic weight of eight 644 00:36:30,771 --> 00:36:33,441 and helium with an atomic weight of four, 645 00:36:33,482 --> 00:36:36,903 combining to make carbon with an atomic weight of 12. 646 00:36:36,986 --> 00:36:37,987 But there's a catch. 647 00:36:42,783 --> 00:36:45,912 When he did the math, the resulting carbon would have a higher 648 00:36:45,995 --> 00:36:48,414 energy state than the ordinary carbon 649 00:36:48,497 --> 00:36:51,542 that we have around us in our solar system. 650 00:36:53,044 --> 00:36:55,880 And this higher energy version of carbon would have to exist 651 00:36:55,963 --> 00:36:58,257 for beryllium and helium to come together 652 00:36:58,341 --> 00:36:59,800 to form carbon in the first place. 653 00:37:02,970 --> 00:37:05,806 So, if you have a wine glass and you flick it, 654 00:37:08,476 --> 00:37:10,978 it will have a certain note that it puts out there, 655 00:37:11,020 --> 00:37:12,647 a certain frequency. 656 00:37:12,688 --> 00:37:16,317 If I sing that frequency back at the wine glass, 657 00:37:16,359 --> 00:37:21,030 it will absorb that sound much more effectively than 658 00:37:21,072 --> 00:37:24,158 if I just sing some other random note at the wine glass. 659 00:37:26,911 --> 00:37:31,415 There's a way that a carbon nucleus could sing, 660 00:37:31,457 --> 00:37:33,960 could wobble around, could vibrate 661 00:37:34,043 --> 00:37:36,170 and oscillate in just the right way... 662 00:37:38,547 --> 00:37:42,093 that it would live long enough to sort of hold itself together 663 00:37:42,134 --> 00:37:46,555 in time to make a stable carbon nucleus rather than a couple 664 00:37:46,639 --> 00:37:48,224 of things falling apart. 665 00:37:48,307 --> 00:37:51,394 Without this singing frequency in a carbon atom, 666 00:37:53,145 --> 00:37:54,438 the process just won't work. 667 00:37:57,483 --> 00:37:59,360 Hoyle realized that there must be a version 668 00:37:59,402 --> 00:38:02,822 of the carbon atom capable of vibrating at a precise frequency 669 00:38:02,905 --> 00:38:05,449 that would allow it to absorb the combined energies 670 00:38:05,491 --> 00:38:08,536 of the beryllium and helium so that carbon could form. 671 00:38:09,620 --> 00:38:12,289 After which time, it would settle into the stable form of carbon 672 00:38:12,373 --> 00:38:13,791 that we see all around us today. 673 00:38:15,418 --> 00:38:19,547 Now, what Hoyle did was to say, "All right, well, 674 00:38:19,630 --> 00:38:22,466 if that's the way that carbon's got to be made in the universe, 675 00:38:23,843 --> 00:38:27,138 carbon better sing at just this energy level, 676 00:38:27,179 --> 00:38:29,015 otherwise this whole thing's not gonna work.” 677 00:38:30,891 --> 00:38:34,395 So, he contracted with a physicist out 678 00:38:34,478 --> 00:38:36,188 at Caltech named Willie Fowler. 679 00:38:37,815 --> 00:38:40,276 So, Hoyle was invited to Caltech 680 00:38:40,359 --> 00:38:42,820 to give a lecture on the steady state theory. 681 00:38:43,821 --> 00:38:47,867 The next day, he came into the laboratory 682 00:38:47,950 --> 00:38:51,495 and began asking us questions about the energy levels 683 00:38:51,537 --> 00:38:52,830 of the carbon-12 nucleus. 684 00:38:53,998 --> 00:38:57,293 And we kind of gave him the brush off. 685 00:38:58,502 --> 00:39:00,880 "Get away from us, young fellow. 686 00:39:00,963 --> 00:39:02,798 You bother us.” 687 00:39:02,882 --> 00:39:04,216 See, we didn't know him all that well. 688 00:39:04,300 --> 00:39:06,719 And there was this funny little man who thought 689 00:39:06,802 --> 00:39:08,929 that we should stop all this important work 690 00:39:09,013 --> 00:39:11,432 that we were doing otherwise and look for this. 691 00:39:12,933 --> 00:39:16,562 He convinced Ward Whaling, who was an assistant 692 00:39:16,604 --> 00:39:20,399 or associate professor at that time, to give it a whirl. 693 00:39:20,483 --> 00:39:21,567 And sure enough... 694 00:39:24,236 --> 00:39:29,450 the energy he got was almost exactly what Hoyle had predicted. 695 00:39:31,035 --> 00:39:33,370 It was really quite a tour de force 696 00:39:33,454 --> 00:39:35,664 that a man had walked into the lab, 697 00:39:35,706 --> 00:39:38,501 predicted the existence of an excited state 698 00:39:38,542 --> 00:39:40,961 of a nucleus from astrophysical arguments. 699 00:39:42,338 --> 00:39:44,298 We then took Hoyle very seriously. 700 00:39:45,633 --> 00:39:47,802 That confirmed Hoyle's suspicion 701 00:39:47,885 --> 00:39:49,428 about how carbon might have been made, 702 00:39:49,470 --> 00:39:51,639 but it turned out to be the tip of the iceberg 703 00:39:51,680 --> 00:39:52,681 of a deeper problem. 704 00:39:54,308 --> 00:39:55,142 The fact that carbon sings 705 00:39:55,184 --> 00:39:59,522 at just this energy level itself depends on other properties. 706 00:39:59,563 --> 00:40:01,816 The fine-tuning of the energy levels 707 00:40:01,857 --> 00:40:05,486 was the whole cascading effect of other fine-tuning parameters 708 00:40:05,528 --> 00:40:07,196 that were discovered that had to be just right. 709 00:40:11,117 --> 00:40:13,577 Each one of these different parameters falls 710 00:40:13,661 --> 00:40:15,162 within a very narrow tolerance. 711 00:40:16,247 --> 00:40:18,541 We can put fairly precise values 712 00:40:18,624 --> 00:40:20,876 on how finely tuned they have to be. 713 00:40:20,918 --> 00:40:24,171 The probability of the strength of gravity being just right, 714 00:40:24,255 --> 00:40:27,466 one part in 10 to the power of 35. 715 00:40:27,508 --> 00:40:30,302 The odds of the weight of a proton to an electron. 716 00:40:30,344 --> 00:40:31,303 One part in 1,000. 717 00:40:31,345 --> 00:40:33,222 The ratio between the gravitational attraction 718 00:40:33,305 --> 00:40:34,390 and the electromagnetic attraction. 719 00:40:34,473 --> 00:40:36,183 One part in 10 to the power of 4. 720 00:40:36,267 --> 00:40:37,726 The gravitational force compared 721 00:40:37,810 --> 00:40:38,727 with the weak nuclear force. 722 00:40:38,811 --> 00:40:39,937 One part in 10 to the 10,000. 723 00:40:40,020 --> 00:40:41,939 One part in 10 to the 21st power. 724 00:40:42,022 --> 00:40:44,400 Initial expansion rate of the universe. 725 00:40:44,483 --> 00:40:45,693 One part in 10 to the 17. 726 00:40:45,734 --> 00:40:47,486 Not too strong, not too weak, not too fast, 727 00:40:47,570 --> 00:40:50,656 not too slow, not too heavy, not too light. 728 00:40:50,739 --> 00:40:52,616 Everything's got to be just right. 729 00:40:52,700 --> 00:40:53,784 The Goldilocks universe. 730 00:40:56,912 --> 00:40:58,664 It's not just that life would be different or 731 00:40:58,747 --> 00:40:59,790 that history would be different, 732 00:40:59,832 --> 00:41:01,792 but that the universe would not be compatible 733 00:41:01,876 --> 00:41:04,461 with any sort of chemically based life. 734 00:41:04,545 --> 00:41:07,006 The probability of getting these specific 735 00:41:07,047 --> 00:41:10,134 parameters right is infinitesimally small. 736 00:41:12,636 --> 00:41:14,054 Unless it's also claimed 737 00:41:14,138 --> 00:41:19,268 that instruction happens by sort of divine providence, 738 00:41:21,228 --> 00:41:24,732 ex machina, to be just such. 739 00:41:27,526 --> 00:41:30,696 I felt obliged to take seriously the proposition 740 00:41:30,779 --> 00:41:33,991 that life is a cosmic phenomenon. 741 00:41:34,033 --> 00:41:35,910 By a cosmic phenomenon, 742 00:41:35,993 --> 00:41:39,205 Hoyle meant that life in the universe was a consequence 743 00:41:39,288 --> 00:41:42,416 of the precise fine-tuning of the physical parameters 744 00:41:42,500 --> 00:41:43,626 of the entire universe. 745 00:41:50,758 --> 00:41:54,094 So, the concept of life as a cosmic phenomenon, 746 00:41:54,178 --> 00:41:57,139 if it's correct, should have many consequences. 747 00:42:01,936 --> 00:42:05,314 The question then was what does one do about it? 748 00:42:09,568 --> 00:42:11,654 And at the end of this investigation, 749 00:42:11,737 --> 00:42:12,738 Hoyle shifted. 750 00:42:14,531 --> 00:42:19,328 And he attributes his conversion from an aggressive form 751 00:42:19,370 --> 00:42:22,498 of scientific atheism to affirming some kind 752 00:42:22,539 --> 00:42:24,667 of intelligent design behind the universe, 753 00:42:24,708 --> 00:42:26,335 to his discovery, his own discovery 754 00:42:26,377 --> 00:42:27,544 of these fine-tuning parameters. 755 00:42:29,338 --> 00:42:32,007 He's later quoted as saying that a common-sense interpretation 756 00:42:32,091 --> 00:42:35,094 of the evidence suggests that a super-intellect has monkeyed 757 00:42:35,135 --> 00:42:37,930 with physics and chemistry to make life possible. 758 00:42:56,740 --> 00:42:57,449 Think of it like this. 759 00:42:57,533 --> 00:43:00,160 Suppose that I'm a detective arriving on the scene of a crime. 760 00:43:00,244 --> 00:43:03,455 I'm at a bank, and there's been a heist, OK? 761 00:43:03,539 --> 00:43:06,834 The safe is open, all the money is gone, 762 00:43:06,917 --> 00:43:09,920 and I say, "All right, let's have a look at security footage.” 763 00:43:11,046 --> 00:43:13,632 And I'm watching on the little screen, 764 00:43:13,716 --> 00:43:18,053 and the burglars come in, and they walk up to the safe, 765 00:43:18,137 --> 00:43:23,017 and there is a 12-digit code, and they walk up 766 00:43:23,100 --> 00:43:26,270 and punch in the correct code. 767 00:43:26,353 --> 00:43:28,564 Opens up, and off they go. 768 00:43:28,647 --> 00:43:30,482 Here's two possible explanations. 769 00:43:30,566 --> 00:43:34,403 Maybe these are really lucky robbers, 770 00:43:34,445 --> 00:43:38,032 but they just guess the first 12-digit code that comes to mind, 771 00:43:38,115 --> 00:43:39,575 and hey presto, they take the money. 772 00:43:40,868 --> 00:43:42,494 Here's another option. 773 00:43:42,578 --> 00:43:44,537 It's an inside job. 774 00:43:44,538 --> 00:43:47,291 Someone who already knew the code told 775 00:43:47,374 --> 00:43:48,751 the robbers what the code is. 776 00:43:50,002 --> 00:43:55,215 Let's pause the video just as the lead thief puts his finger up 777 00:43:55,299 --> 00:43:56,550 in order to put the code in. 778 00:43:57,885 --> 00:44:00,346 What would we expect to happen according 779 00:44:00,387 --> 00:44:04,058 to the first hypothesis, the they got lucky? 780 00:44:04,141 --> 00:44:07,144 Well, if they're just guessing the code, 781 00:44:07,227 --> 00:44:09,355 then we'd expect them to put in the wrong code. 782 00:44:10,731 --> 00:44:12,775 We can't really predict what code you would put in, 783 00:44:12,858 --> 00:44:14,693 but we can predict with a high degree 784 00:44:14,777 --> 00:44:16,570 of certainty you put in the wrong one. 785 00:44:16,612 --> 00:44:19,073 And so, our expectation there that naturally forms 786 00:44:19,156 --> 00:44:22,659 from that scenario doesn't match with what actually happens. 787 00:44:24,119 --> 00:44:27,206 On the other hand, if we knew it was an inside job 788 00:44:28,290 --> 00:44:31,627 and we stopped the video just before they put in the code, 789 00:44:31,668 --> 00:44:34,004 we would expect them to put in the right code 790 00:44:34,088 --> 00:44:35,089 and get into the vault. 791 00:44:36,173 --> 00:44:38,384 It's possible by random means 792 00:44:38,467 --> 00:44:40,386 that some process would have stumbled 793 00:44:40,427 --> 00:44:42,471 on exactly the parameters needed 794 00:44:42,554 --> 00:44:44,681 to create a life-friendly universe. 795 00:44:44,765 --> 00:44:46,934 But our overwhelming expectation, 796 00:44:46,975 --> 00:44:49,937 if we consider the odds, is that without guidance, 797 00:44:49,978 --> 00:44:52,439 we would get a life-unfriendly universe. 798 00:44:52,481 --> 00:44:54,441 But that's not the kind of universe we see. 799 00:44:55,901 --> 00:44:59,029 Instead, we see the kind of universe we would expect 800 00:44:59,113 --> 00:45:01,573 if it had been intentionally set up for life, 801 00:45:01,698 --> 00:45:03,701 suggesting that it was intended. 802 00:45:03,784 --> 00:45:06,203 Fine-tuning implies a fine-tuner. 803 00:45:11,542 --> 00:45:13,252 But there's another type of fine-tuning. 804 00:45:17,047 --> 00:45:19,425 And that's the fine-tuning of the initial arrangement 805 00:45:19,508 --> 00:45:21,927 of matter at the very beginning of the universe. 806 00:45:24,221 --> 00:45:27,766 If you thought the idea of a Big Bang was one of order emerging 807 00:45:27,808 --> 00:45:30,310 from chaos, get that out of your mind. 808 00:45:30,394 --> 00:45:32,146 It's exactly the opposite. 809 00:45:32,187 --> 00:45:35,399 What we have is an initial moment 810 00:45:35,482 --> 00:45:38,527 of exquisite precision and order. 811 00:45:39,945 --> 00:45:41,613 One of the remarkable things about the universe we 812 00:45:41,697 --> 00:45:47,286 see around us is there's a direction, so to speak, of time. 813 00:45:47,369 --> 00:45:50,247 This fact that processes go one way 814 00:45:50,289 --> 00:45:54,084 but not the other is captured in a physical quantity called 815 00:45:54,126 --> 00:45:57,754 entropy, which very roughly, in a sort of hand-wavy way, 816 00:45:57,796 --> 00:46:00,466 measures the amount of disorder in a system. 817 00:46:01,508 --> 00:46:02,634 The more chaotic, 818 00:46:02,676 --> 00:46:05,554 the more random the distribution, the higher the entropy. 819 00:46:05,637 --> 00:46:08,724 The more ordered the system, the lower the entropy. 820 00:46:08,807 --> 00:46:11,393 You have a glass of coffee, and you have a glass of milk. 821 00:46:12,895 --> 00:46:13,896 It's highly ordered. 822 00:46:15,147 --> 00:46:16,106 Then, you mix them together. 823 00:46:16,190 --> 00:46:19,735 They're completely disordered and random. 824 00:46:21,778 --> 00:46:26,450 We see things happening seemingly only in a way 825 00:46:26,533 --> 00:46:27,826 that entropy increases. 826 00:46:30,954 --> 00:46:34,458 No one has ever put a spoon into coffee 827 00:46:34,500 --> 00:46:37,836 and stirred it and separated the milk out from the coffee. 828 00:46:37,920 --> 00:46:38,879 Never happened. 829 00:46:39,963 --> 00:46:41,173 What's going on with all of this? 830 00:46:43,509 --> 00:46:46,261 Since entropy is increasing continuously, 831 00:46:46,345 --> 00:46:48,472 that means that if we go into the past, 832 00:46:48,514 --> 00:46:50,307 entropy had to be decreasing. 833 00:46:51,558 --> 00:46:53,894 To allow things to be this orderly now, 834 00:46:55,187 --> 00:46:58,273 how orderly must the universe have been at the beginning? 835 00:47:06,073 --> 00:47:08,075 This is where a very interesting argument 836 00:47:08,158 --> 00:47:10,202 from Roger Penrose comes in. 837 00:47:10,285 --> 00:47:12,287 What Penrose worked out was, OK, 838 00:47:12,329 --> 00:47:14,206 if we consider the full set of possibilities 839 00:47:14,289 --> 00:47:15,874 for the way you could start a universe, 840 00:47:17,334 --> 00:47:21,588 our sort of universe is an extraordinarily small piece 841 00:47:21,672 --> 00:47:23,549 of that set of possibilities. 842 00:47:23,632 --> 00:47:25,259 He has calculated 843 00:47:25,342 --> 00:47:28,887 that initial entropy fine-tuning as one chance 844 00:47:28,971 --> 00:47:33,934 in 10 to the 10th power raised again to the 123rd power. 845 00:47:34,017 --> 00:47:36,395 It's called a hyper-exponential number. 846 00:47:38,689 --> 00:47:40,107 What that's telling us is there's something 847 00:47:40,148 --> 00:47:43,569 remarkably special about the start of our universe. 848 00:47:46,655 --> 00:47:51,118 There has to be something about the arrangement of the stuff, 849 00:47:51,201 --> 00:47:55,163 whatever the stuff was, very early in the universe, 850 00:47:55,289 --> 00:47:56,623 which is not the typical way you 851 00:47:56,707 --> 00:47:58,292 would expect a universe to start. 852 00:48:00,544 --> 00:48:02,087 You could understand this by analogy. 853 00:48:02,170 --> 00:48:04,548 In the old days, when civil engineers were building a tunnel 854 00:48:04,631 --> 00:48:08,343 through a mountainside, they would configure a charge just right 855 00:48:08,427 --> 00:48:11,263 to make sure that the blast removed the rock 856 00:48:11,346 --> 00:48:13,307 where they wanted it to be removed. 857 00:48:13,348 --> 00:48:16,560 And very small adjustments in the initial positioning 858 00:48:16,643 --> 00:48:19,771 of those explosive charges would make very big differences 859 00:48:19,813 --> 00:48:22,566 in where the hole appeared in the mountainside. 860 00:48:22,691 --> 00:48:24,818 Analogously, that's what's going on with the fine-tuning 861 00:48:24,860 --> 00:48:26,153 of the initial entropy of the universe. 862 00:48:27,904 --> 00:48:28,905 You can just think of it this way. 863 00:48:30,115 --> 00:48:34,077 The amount of disorder is so small that it's nearly perfect. 864 00:48:43,837 --> 00:48:45,797 There's a famous passage in the 865 00:48:45,881 --> 00:48:47,966 "General Scholium to the Principia", 866 00:48:52,679 --> 00:48:53,805 which is an epilogue 867 00:48:53,847 --> 00:48:55,641 that Newton wrote in one of the later editions 868 00:48:55,682 --> 00:48:57,643 to his great work on universal gravitation. 869 00:48:58,644 --> 00:49:04,066 He's describing the beautiful balance of the planets, 870 00:49:04,107 --> 00:49:08,111 the sun, the comets that create this stable order. 871 00:49:09,946 --> 00:49:12,824 In this passage, he says, "This most beautiful system of sun, 872 00:49:12,908 --> 00:49:16,119 planets, and comets could only proceed from the counsel 873 00:49:16,203 --> 00:49:18,664 and dominion of an intelligent and powerful being.” 874 00:49:25,003 --> 00:49:26,797 Even in a highly fine-tuned universe, 875 00:49:28,173 --> 00:49:30,384 you still need a heck of a lot more to go right 876 00:49:30,467 --> 00:49:34,971 in a planetary environment in order for not only complex life 877 00:49:35,013 --> 00:49:40,769 in general, but human life in particular to exist. 878 00:49:40,852 --> 00:49:44,815 Our solar system, especially in view 879 00:49:44,898 --> 00:49:47,818 of what we now have learned about other solar systems, 880 00:49:47,901 --> 00:49:49,903 really ends up looking quite remarkable. 881 00:49:51,738 --> 00:49:54,533 Our solar system has terrestrial planets... 882 00:50:00,414 --> 00:50:02,040 in neat, circular orbits. 883 00:50:05,043 --> 00:50:06,962 And then, you get to these gas giants... 884 00:50:11,550 --> 00:50:13,760 that are also in neat, circular orbits. 885 00:50:18,473 --> 00:50:19,933 They serve as guards. 886 00:50:19,975 --> 00:50:22,769 They serve as sentinels for our solar system so that they, 887 00:50:22,811 --> 00:50:25,647 very often, take hits for us from these comets... 888 00:50:29,484 --> 00:50:31,486 that if they were not there would find their way 889 00:50:31,528 --> 00:50:34,197 into our neighborhood and have an unfortunate tendency 890 00:50:34,281 --> 00:50:35,907 to sterilize life on our planet. 891 00:50:37,033 --> 00:50:38,952 For example, the comet Shoemaker-Levy, 892 00:50:40,537 --> 00:50:41,538 it ended up in Jupiter. 893 00:50:42,873 --> 00:50:43,832 Jupiter and Saturn, 894 00:50:43,874 --> 00:50:47,836 these planets that for a long time were associated with Greek 895 00:50:47,878 --> 00:50:53,633 and Roman gods, actually do play a role in protecting us. 896 00:50:56,845 --> 00:51:00,682 And all of this around a stable, 897 00:51:00,766 --> 00:51:02,642 energetic, metal-rich star. 898 00:51:05,145 --> 00:51:07,397 Just these makes the solar system pretty unique. 899 00:51:08,523 --> 00:51:12,861 Beyond that, our own planet within the solar system is situated 900 00:51:12,944 --> 00:51:14,905 in what we call the circumstellar habitable zone. 901 00:51:19,451 --> 00:51:22,579 If we were too close, radiation would kill us. 902 00:51:22,662 --> 00:51:25,415 If we were too far away, our planet wouldn't have the right 903 00:51:25,499 --> 00:51:27,876 materials to support life in the way it does. 904 00:51:27,918 --> 00:51:29,544 It's the right tilt and has the right 905 00:51:29,628 --> 00:51:31,588 rotation rate so that we have seasons. 906 00:51:33,048 --> 00:51:35,133 You need a large moon in order 907 00:51:35,217 --> 00:51:38,470 to stabilize the planet's tilt on its axis. 908 00:51:38,512 --> 00:51:39,471 In addition, what the moon 909 00:51:39,554 --> 00:51:42,432 does is that recirculates the ocean through the tides 910 00:51:42,516 --> 00:51:44,601 to allow oxygen to get to deeper levels. 911 00:51:44,684 --> 00:51:46,102 You need the right kind of atmosphere, 912 00:51:46,186 --> 00:51:47,521 the right thickness of the atmosphere, 913 00:51:47,604 --> 00:51:51,066 the right mass for the planet in order to hold the right kind 914 00:51:51,149 --> 00:51:53,193 of atmosphere in place, and then you 915 00:51:53,235 --> 00:51:55,237 need the right kind of geology. 916 00:51:55,278 --> 00:51:58,782 We have a molten magma in the Earth that rotates. 917 00:51:58,824 --> 00:52:00,534 That creates a magnetic shield. 918 00:52:00,575 --> 00:52:01,910 That has an important consequence 919 00:52:01,952 --> 00:52:04,913 because the magnetic field of the Earth is our blanket, 920 00:52:04,955 --> 00:52:07,749 our shield against dangerous, deadly cosmic radiation 921 00:52:07,791 --> 00:52:09,960 that would otherwise modify our DNA, 922 00:52:10,001 --> 00:52:12,420 preventing us from perhaps ever coming to exist. 923 00:52:15,549 --> 00:52:16,633 It's not at all obvious 924 00:52:16,675 --> 00:52:19,010 that that necessarily has to happen. 925 00:52:20,554 --> 00:52:23,223 In some ways, Mars is the perfect example 926 00:52:23,306 --> 00:52:25,892 of how precisely things have to be fine-tuned 927 00:52:25,976 --> 00:52:28,979 at a local level in order to have life. 928 00:52:30,939 --> 00:52:35,193 Remember, Mars is the most Earth-like planet known 929 00:52:35,277 --> 00:52:36,278 in the universe. 930 00:52:40,407 --> 00:52:43,535 Mars is in an otherwise habitable solar system. 931 00:52:43,577 --> 00:52:46,746 It's very close to the Goldilocks zone in its orbit. 932 00:52:46,788 --> 00:52:49,541 It's close to the same mass as Earth. 933 00:52:49,624 --> 00:52:51,167 It has many of the same materials. 934 00:52:51,209 --> 00:52:54,379 And yet a few things didn't go quite right. 935 00:52:54,462 --> 00:52:56,840 And as a result, it's lifeless while 936 00:52:56,882 --> 00:52:59,342 Earth is suffused with life. 937 00:52:59,384 --> 00:53:03,513 It's a remarkably exquisite system of design 938 00:53:03,555 --> 00:53:06,182 in which all of these pieces have to work together in order 939 00:53:06,266 --> 00:53:10,729 to produce a small abode on the surface of a single small planet 940 00:53:12,230 --> 00:53:13,523 where life can exist. 941 00:53:28,538 --> 00:53:30,582 One of the most curious attempts 942 00:53:30,665 --> 00:53:34,544 to get a round inference to design 943 00:53:34,586 --> 00:53:38,965 in the universe is to push it all off onto the concept 944 00:53:39,049 --> 00:53:40,467 of a multiverse. 945 00:53:44,596 --> 00:53:46,473 The idea that there are billions and billions 946 00:53:46,556 --> 00:53:48,975 and billions of other universes out there, 947 00:53:49,059 --> 00:53:50,852 which had different combinations 948 00:53:50,936 --> 00:53:52,562 of fundamental physical parameters 949 00:53:52,646 --> 00:53:54,439 and different initial conditions, 950 00:53:56,358 --> 00:53:58,777 and we just happen to be in the lucky one. 951 00:53:58,860 --> 00:54:00,737 Given enough universes, 952 00:54:00,820 --> 00:54:04,407 presumably at least one or a few of those universes will exist 953 00:54:04,449 --> 00:54:06,534 in such a way that complex life can exist. 954 00:54:09,245 --> 00:54:11,122 The nice thing about the multiverse explanation 955 00:54:11,206 --> 00:54:14,960 is it shows that this fine-tuning business seems 956 00:54:15,043 --> 00:54:17,545 to be pointing beyond the universe as we know it. 957 00:54:17,629 --> 00:54:18,964 There's got to be something else. 958 00:54:19,047 --> 00:54:20,548 There's got to be a bigger story out there. 959 00:54:23,343 --> 00:54:26,888 The multiverse, as an appeal to a materialistic, 960 00:54:26,972 --> 00:54:33,645 naturalistic explanation, loses any of its original attraction. 961 00:54:35,021 --> 00:54:38,566 Anything that's outside of this nature is essentially, 962 00:54:39,734 --> 00:54:41,277 manifestly supernatural. 963 00:54:42,529 --> 00:54:44,572 And so, we're appealing to something supernatural 964 00:54:45,991 --> 00:54:47,283 to avoid the supernatural. 965 00:54:51,121 --> 00:54:52,455 Leonard Susskind, 966 00:54:52,539 --> 00:54:55,291 a prominent physicist at Stanford, says, "Look, 967 00:54:55,333 --> 00:54:59,295 if we don't posit this kind of a multiverse model, 968 00:54:59,379 --> 00:55:01,172 we're hard pressed to answer the arguments 969 00:55:01,256 --> 00:55:04,509 of the ID proponents as to how to explain the fine-tuning.” 970 00:55:07,679 --> 00:55:08,805 But there's a problem with that. 971 00:55:10,473 --> 00:55:12,726 For the multiverse explanation to work, 972 00:55:12,809 --> 00:55:15,603 there must be some kind of universe-generating mechanism, 973 00:55:15,687 --> 00:55:18,523 a kind of common cause of all the universes so that we 974 00:55:18,565 --> 00:55:21,735 can portray each of the universes as the outcome 975 00:55:21,776 --> 00:55:23,319 of a kind of cosmic lottery. 976 00:55:26,489 --> 00:55:28,158 And these universe-generating machines, 977 00:55:28,199 --> 00:55:30,577 where they're constantly generating universes 978 00:55:30,660 --> 00:55:33,538 with slightly different parameters and laws of physics. 979 00:55:39,252 --> 00:55:40,295 And this is the sleeper. 980 00:55:41,504 --> 00:55:43,798 All the speculative cosmological models 981 00:55:43,882 --> 00:55:47,302 that have been invoked to explain how you might generate new 982 00:55:47,385 --> 00:55:50,305 universes, whether those models are based on string theory 983 00:55:50,388 --> 00:55:52,557 or something called inflationary cosmology, 984 00:55:55,351 --> 00:55:57,687 all those models require exquisite, 985 00:55:57,771 --> 00:56:01,524 prior fine-tuning in the universe-generating mechanism 986 00:56:01,566 --> 00:56:03,109 that is proposed. 987 00:56:05,653 --> 00:56:07,530 If a monkey clicked on a typewriter 988 00:56:07,572 --> 00:56:10,075 for an infinite amount of time, in theory 989 00:56:10,158 --> 00:56:12,077 it would eventually type out Hamlet. 990 00:56:14,079 --> 00:56:16,414 But if the typewriter didn't have the letter H, 991 00:56:16,498 --> 00:56:17,916 then it wouldn't stand a chance. 992 00:56:20,251 --> 00:56:23,713 Just as the parts of the typewriter need to be fine-tuned 993 00:56:23,797 --> 00:56:26,257 to include all the letters of the alphabet 994 00:56:26,299 --> 00:56:29,094 to make possible typing different words and sentences, 995 00:56:30,178 --> 00:56:33,640 so too, all proposed universe-generating mechanisms 996 00:56:33,723 --> 00:56:36,351 would require fine-tuning to make it possible 997 00:56:36,434 --> 00:56:38,853 to generate different universes with different 998 00:56:38,937 --> 00:56:41,564 initial conditions and laws of physics. 999 00:56:43,525 --> 00:56:45,360 The multiverse doesn't actually get rid 1000 00:56:45,443 --> 00:56:48,363 of the fine-tuning or explain the origin of the fine-tuning. 1001 00:56:48,446 --> 00:56:52,283 You really just push the fine-tuning problem back one generation 1002 00:56:52,367 --> 00:56:53,743 without solving it. 1003 00:56:53,827 --> 00:56:56,871 And yet we know of one cause that does produce fine-tuning 1004 00:56:56,913 --> 00:56:58,039 in our experience. 1005 00:56:58,081 --> 00:57:00,500 Whenever we see what we call fine-tuning, 1006 00:57:00,542 --> 00:57:04,337 we always trace that type of a system back to a mind, 1007 00:57:04,420 --> 00:57:06,840 whether we're talking about a finely tuned French recipe, 1008 00:57:06,923 --> 00:57:09,300 a finely tuned internal combustion engine, 1009 00:57:09,384 --> 00:57:11,928 or a finely tuned radio dial. 1010 00:57:11,970 --> 00:57:15,640 The ability to look at a set of possibilities 1011 00:57:15,682 --> 00:57:21,020 and to choose an outcome is almost by definition intentional. 1012 00:57:21,062 --> 00:57:24,774 It's something that a mind does that sort 1013 00:57:24,858 --> 00:57:27,402 of mindless matter doesn't do. 1014 00:57:27,485 --> 00:57:29,988 So, given that the multiverse doesn't actually 1015 00:57:30,071 --> 00:57:33,116 provide an ultimate explanation for fine-tuning, 1016 00:57:33,158 --> 00:57:35,285 the best explanation for fine-tuning 1017 00:57:35,368 --> 00:57:36,619 is still intelligent design. 1018 00:57:37,662 --> 00:57:40,707 The multiverse is like this gateway drug. 1019 00:57:40,790 --> 00:57:42,000 Once you're lost in the multiverse, 1020 00:57:42,083 --> 00:57:43,668 you might as well be in a simulation. 1021 00:57:43,751 --> 00:57:44,961 Some people have argued 1022 00:57:45,003 --> 00:57:47,297 that our universe is actually a simulation, 1023 00:57:47,380 --> 00:57:48,798 that there's perhaps some extraordinary 1024 00:57:48,840 --> 00:57:50,800 computer that's running a simulation. 1025 00:57:50,842 --> 00:57:51,968 We're part of that simulation. 1026 00:57:53,303 --> 00:57:54,512 The simulation theory? 1027 00:57:56,264 --> 00:57:58,349 That belongs in the movies. 1028 00:57:58,391 --> 00:57:59,893 Come on, that's ridiculous. 1029 00:57:59,976 --> 00:58:01,311 We're not living in a simulation. 1030 00:58:02,562 --> 00:58:05,148 There's no evidence of a discrete film being run 1031 00:58:05,231 --> 00:58:06,733 in the background. 1032 00:58:06,774 --> 00:58:08,234 This is not what I would consider, 1033 00:58:08,276 --> 00:58:11,487 or what you would consider, sophisticated discourse. 1034 00:58:12,655 --> 00:58:14,073 Has nothing to do with science. 1035 00:58:14,157 --> 00:58:16,868 I think what all these things have in common, 1036 00:58:16,951 --> 00:58:19,787 the simulation theory, the multiverse, 1037 00:58:19,829 --> 00:58:21,748 you can't trust what's in front of your eyes. 1038 00:58:21,831 --> 00:58:24,751 The multiverse, simulation hypothesis, 1039 00:58:24,834 --> 00:58:27,962 we're living in a computer, all those sorts of things, 1040 00:58:28,004 --> 00:58:29,380 there's nothing wrong with any of this. 1041 00:58:29,464 --> 00:58:31,549 It just shouldn't be mistaken for anything serious. 1042 00:58:43,436 --> 00:58:45,772 We're not only seeing evidence of design 1043 00:58:45,813 --> 00:58:48,650 at the macroscopic scale of the entire universe 1044 00:58:48,733 --> 00:58:51,236 and in the fundamental parameters of physics 1045 00:58:51,319 --> 00:58:53,196 that affect the whole of the cosmos, 1046 00:58:55,156 --> 00:58:58,076 but we're now seeing design in the microcosm 1047 00:59:00,245 --> 00:59:02,538 and the tiny recesses of living cells. 1048 00:59:22,308 --> 00:59:25,353 Back in the middle of the 19th century, 1049 00:59:25,436 --> 00:59:27,855 the cell was thought to be a little piece of jelly, 1050 00:59:27,939 --> 00:59:30,024 so it seemed to be pretty simple. 1051 00:59:30,066 --> 00:59:31,859 Thomas Henry Huxley said 1052 00:59:31,943 --> 00:59:33,987 that the living cell is a simple, 1053 00:59:34,028 --> 00:59:38,074 homogenous globule of undifferentiated protoplasm. 1054 00:59:38,157 --> 00:59:40,785 It's just a simple enclosure with some Jello 1055 00:59:40,868 --> 00:59:42,704 or goo on the inside. 1056 00:59:42,745 --> 00:59:45,081 But modern science has shown 1057 00:59:45,123 --> 00:59:51,713 that the cell is an enormously complex nanoscale factory. 1058 00:59:51,754 --> 00:59:56,134 And when you study biochemistry, you come across machinery, 1059 00:59:56,217 --> 00:59:58,136 literally molecular machines. 1060 01:00:02,098 --> 01:00:06,686 One of my favorites is the bacterial flagellum. 1061 01:00:07,687 --> 01:00:11,232 It is quite literally an outboard motor 1062 01:00:12,900 --> 01:00:15,403 that bacteria use to swim. 1063 01:00:18,948 --> 01:00:22,785 It's got a propeller, this long whip-like strand. 1064 01:00:25,079 --> 01:00:31,044 And the propeller is attached to the drive shaft 1065 01:00:31,127 --> 01:00:37,008 by something called the U-joint, which is attached to the motor. 1066 01:00:38,760 --> 01:00:42,889 And the motor is hooked onto the cell membrane 1067 01:00:42,930 --> 01:00:44,223 by something called the stator. 1068 01:00:45,308 --> 01:00:48,436 The stator requires bushing to push up 1069 01:00:48,519 --> 01:00:50,396 through the membrane of the cell. 1070 01:00:50,480 --> 01:00:53,441 And altogether, there are 30 parts that are needed for it. 1071 01:00:55,860 --> 01:00:58,571 In some species, the flagellar motor is rotating 1072 01:00:58,613 --> 01:01:01,657 at 100,000 rpm, and it can change direction 1073 01:01:01,699 --> 01:01:02,700 in a quarter of a turn. 1074 01:01:07,413 --> 01:01:09,123 It's an absolutely amazing piece 1075 01:01:09,165 --> 01:01:11,417 of high technology in a low form of life. 1076 01:01:15,505 --> 01:01:17,632 Another great example of a molecular machine 1077 01:01:17,715 --> 01:01:20,385 in the cell is the ATP synthase. 1078 01:01:21,803 --> 01:01:23,012 It's a true turbine 1079 01:01:23,054 --> 01:01:25,264 that generates energy for use in the cell 1080 01:01:25,306 --> 01:01:28,559 in much the same way a turbine in a dam generates electricity. 1081 01:01:30,770 --> 01:01:32,980 It's an engine with a barrel-shaped rotor made 1082 01:01:33,064 --> 01:01:34,857 of protein subunits. 1083 01:01:34,941 --> 01:01:38,069 As the rotor spins, it turns a drive shaft with a specially 1084 01:01:38,152 --> 01:01:42,365 placed bump that opens a specifically shaped compartment. 1085 01:01:42,448 --> 01:01:45,535 Once opened, this compartment receives two molecules 1086 01:01:45,618 --> 01:01:48,287 and combines them to form another energy-rich molecule 1087 01:01:48,371 --> 01:01:51,040 called ATP, the power plant for the cell. 1088 01:01:56,212 --> 01:01:57,171 And there's a whole host 1089 01:01:57,213 --> 01:01:59,090 of molecular machines inside cells. 1090 01:02:00,842 --> 01:02:04,178 turbines, rotary engines, sliding clamps, 1091 01:02:04,262 --> 01:02:06,806 machines for copying digital information. 1092 01:02:06,848 --> 01:02:08,891 We've got kinesin motors that are running 1093 01:02:08,975 --> 01:02:12,937 along that are basically UPS trucks that are delivering things. 1094 01:02:12,979 --> 01:02:16,149 Motor proteins that walk step by step as they tow vesicles 1095 01:02:16,190 --> 01:02:19,277 of material along tracks made of other special proteins. 1096 01:02:24,699 --> 01:02:25,658 Darwin knew nothing 1097 01:02:25,741 --> 01:02:29,704 of these sophisticated multi-part machines in the 19th century, 1098 01:02:29,745 --> 01:02:32,290 and his theory is not equipped to explain them. 1099 01:02:33,541 --> 01:02:37,211 Darwin himself said, "If it could be demonstrated 1100 01:02:37,253 --> 01:02:41,549 that there was any system that could not be put together 1101 01:02:41,632 --> 01:02:45,303 by numerous, successive, slight modifications, 1102 01:02:46,554 --> 01:02:48,556 my theory would absolutely break down.” 1103 01:02:50,266 --> 01:02:52,310 In the bacterial flagellar motor, 1104 01:02:52,351 --> 01:02:54,187 if you take away the drive shaft or 1105 01:02:54,270 --> 01:02:58,733 if you take away the propeller or the U-joint, it's broken. 1106 01:03:00,067 --> 01:03:03,988 If any key component of the flagellar motor is removed, 1107 01:03:04,071 --> 01:03:05,490 it stops functioning. 1108 01:03:05,573 --> 01:03:10,119 This means simpler evolutionary precursors wouldn't have worked. 1109 01:03:10,161 --> 01:03:12,955 So, natural selection wouldn't have preserved them, 1110 01:03:13,039 --> 01:03:14,957 halting evolution before the fully 1111 01:03:15,041 --> 01:03:16,459 functional motor could develop. 1112 01:03:19,754 --> 01:03:23,841 On the flip side, when you see a system that's put together 1113 01:03:23,883 --> 01:03:26,511 with a number of components matched to each other, 1114 01:03:26,594 --> 01:03:29,722 you recognize that's the product of a mind. 1115 01:03:29,805 --> 01:03:32,058 The Darwinian mechanism of mutation 1116 01:03:32,099 --> 01:03:34,644 and selection, which has long been posed as a kind 1117 01:03:34,727 --> 01:03:40,066 of designer-substitute mechanism, cannot build those systems. 1118 01:03:40,107 --> 01:03:42,527 Then, perhaps they look designed 1119 01:03:42,568 --> 01:03:43,819 because they really were designed. 1120 01:03:57,708 --> 01:03:59,168 But there's an even deeper consideration 1121 01:03:59,252 --> 01:04:01,837 that points to intelligent design and biology. 1122 01:04:03,673 --> 01:04:05,299 One of the most brilliant theories 1123 01:04:05,383 --> 01:04:10,054 of modern science was formulated by an American, JD Watson, 1124 01:04:11,305 --> 01:04:13,266 and an Englishman, FHC Crick. 1125 01:04:14,892 --> 01:04:15,893 As soon as we met, 1126 01:04:15,935 --> 01:04:20,147 we found that although we had very different backgrounds, 1127 01:04:20,189 --> 01:04:21,774 we had a lot of things in common. 1128 01:04:21,816 --> 01:04:24,569 Francis Crick was a PhD student 1129 01:04:24,652 --> 01:04:27,154 at Cambridge University, working in physics, 1130 01:04:27,196 --> 01:04:28,322 not even in biology. 1131 01:04:32,076 --> 01:04:35,413 He teamed up with a 23-year-old American named James Watson. 1132 01:04:36,539 --> 01:04:37,540 Neither of us were trained 1133 01:04:37,582 --> 01:04:39,083 for what really interested us now. 1134 01:04:39,166 --> 01:04:40,376 We both wanted to find the gene. 1135 01:04:40,459 --> 01:04:41,544 We weren't organic chemists. 1136 01:04:41,627 --> 01:04:42,587 We weren't anything else. 1137 01:04:45,047 --> 01:04:48,092 And they began to work on what was at the time 1138 01:04:48,175 --> 01:04:51,554 deemed to be kind of the holy grail of biological research. 1139 01:04:55,224 --> 01:04:58,561 By the early 1950s, many scientists were suspecting 1140 01:04:58,644 --> 01:05:01,314 that DNA had something to do with the transmission 1141 01:05:01,355 --> 01:05:05,818 of hereditary information, but didn't know 1142 01:05:05,860 --> 01:05:07,361 what the structure of DNA was. 1143 01:05:08,863 --> 01:05:12,116 And so, Watson and Crick began a kind of odyssey 1144 01:05:12,199 --> 01:05:13,743 to try to crack this problem. 1145 01:05:15,453 --> 01:05:20,875 And by the spring of 1953, they had actually formulated a model 1146 01:05:20,916 --> 01:05:23,419 that elucidated the structure of the DNA molecule. 1147 01:05:23,461 --> 01:05:26,130 They showed that it had a beautiful double helix structure. 1148 01:05:27,673 --> 01:05:29,800 And along the spine of the molecule, 1149 01:05:29,842 --> 01:05:34,055 on the interior, there were chemical subunits, four of them. 1150 01:05:34,138 --> 01:05:38,434 One, two, three, four. 1151 01:05:38,517 --> 01:05:40,936 Now represented with the letters A, T, G, and C. 1152 01:05:42,730 --> 01:05:44,315 A would pair with T. 1153 01:05:44,398 --> 01:05:47,193 And then, you have two other genetic letters. 1154 01:05:47,234 --> 01:05:50,071 C would pair up with G. 1155 01:05:50,112 --> 01:05:52,365 So, you had the double helix. 1156 01:05:54,992 --> 01:05:57,912 So, the discovery of the structure suggested 1157 01:05:57,953 --> 01:06:00,956 that one strand of DNA had a complementary strand... 1158 01:06:03,626 --> 01:06:07,630 that could in turn function as a template for rebuilding 1159 01:06:07,672 --> 01:06:09,548 or copying the original strand. 1160 01:06:16,180 --> 01:06:19,350 And this suggested a duplication process. 1161 01:06:28,526 --> 01:06:30,695 I don't think I worried too much about what 1162 01:06:30,778 --> 01:06:32,780 the structure might tell us. 1163 01:06:32,822 --> 01:06:34,740 I just thought we ought to find out. 1164 01:06:38,494 --> 01:06:41,497 And when we had found out, of course, 1165 01:06:41,539 --> 01:06:43,624 it struck us with a tremendous impact, 1166 01:06:44,834 --> 01:06:48,421 just how beautiful and exciting it was. 1167 01:06:48,504 --> 01:06:52,341 Because there before us was the answer to one 1168 01:06:52,383 --> 01:06:56,762 of the fundamental problems in biology, how do genes replicate? 1169 01:06:56,846 --> 01:07:00,224 And it was very simple, and you couldn't miss it. 1170 01:07:01,767 --> 01:07:03,936 We used to occasionally just, Jim and I, 1171 01:07:04,019 --> 01:07:07,022 just sit and look at the molecule 1172 01:07:07,106 --> 01:07:08,399 and think how beautiful it was. 1173 01:07:11,235 --> 01:07:13,738 Interestingly, Crick had been a code breaker 1174 01:07:13,821 --> 01:07:14,822 in World War II. 1175 01:07:16,031 --> 01:07:19,660 In 1957, he then formulates something called the sequence 1176 01:07:19,702 --> 01:07:22,872 hypothesis, which in many ways, I think is a more significant 1177 01:07:22,913 --> 01:07:25,875 achievement than even the original elucidation of the structure. 1178 01:07:28,544 --> 01:07:32,298 Crick realizes that the four chemical subunits along the spine 1179 01:07:32,381 --> 01:07:34,884 of the double helix, on the interior of the helix, 1180 01:07:36,302 --> 01:07:39,597 are functioning like alphabetic characters in a written text. 1181 01:07:41,182 --> 01:07:44,059 That is to say that it's not the physical properties 1182 01:07:44,143 --> 01:07:44,935 of these subunits. 1183 01:07:44,977 --> 01:07:47,146 It's not their molecular weight or their shape, 1184 01:07:47,229 --> 01:07:50,065 but rather it's their arrangement in accord 1185 01:07:50,149 --> 01:07:52,526 with an independent symbol convention 1186 01:07:52,568 --> 01:07:54,737 that molecular biologists eventually elucidate, 1187 01:07:54,820 --> 01:07:58,199 called the genetic code, that gives them their ability 1188 01:07:58,240 --> 01:07:59,575 to transmit information. 1189 01:08:01,869 --> 01:08:02,912 What also happened 1190 01:08:02,995 --> 01:08:08,793 around the same time was Gamow had shown 1191 01:08:08,876 --> 01:08:12,379 that you could take those letters, As, Cs, Gs, and Ts, 1192 01:08:13,422 --> 01:08:18,719 and you could represent them in binary code, zeros and ones. 1193 01:08:21,514 --> 01:08:26,310 So, it had an uncanny resemblance to a digital bit string. 1194 01:08:32,066 --> 01:08:34,443 It looked very much like an information carrier. 1195 01:08:36,320 --> 01:08:37,321 But for what? 1196 01:08:40,115 --> 01:08:41,992 Crick anticipated this, too. 1197 01:08:42,076 --> 01:08:44,328 He thought these bases were carrying information 1198 01:08:44,411 --> 01:08:45,955 for the construction of proteins. 1199 01:08:47,164 --> 01:08:51,836 A cell is filled with proteins that are performing the tasks 1200 01:08:51,919 --> 01:08:52,878 inside the cells. 1201 01:08:52,962 --> 01:08:54,964 They're like the tools in a toolbox. 1202 01:08:55,005 --> 01:08:57,675 You have a hammer, a wrench, a saw. 1203 01:08:57,716 --> 01:09:00,511 Each of those different tools perform different functions 1204 01:09:00,594 --> 01:09:03,180 because of the different three-dimensional shapes 1205 01:09:03,264 --> 01:09:04,265 that they have. 1206 01:09:05,474 --> 01:09:07,184 The same thing is true of proteins. 1207 01:09:08,811 --> 01:09:11,939 Proteins catalyze reactions at super-fast rates, 1208 01:09:12,022 --> 01:09:13,649 those are called enzyme proteins, 1209 01:09:13,732 --> 01:09:16,652 they build the structural parts of molecular machines, 1210 01:09:16,735 --> 01:09:20,948 and they also help to process information on the DNA molecule. 1211 01:09:22,408 --> 01:09:23,868 So, proteins do all these important jobs, 1212 01:09:23,951 --> 01:09:26,579 but they do those jobs because they have very specific 1213 01:09:26,662 --> 01:09:29,331 three-dimensional conformations or shapes. 1214 01:09:40,009 --> 01:09:43,012 Now that raises the question, how do they acquire those shapes? 1215 01:09:44,221 --> 01:09:47,433 Well, they get those precise shapes if and only 1216 01:09:47,516 --> 01:09:52,563 if the amino acid subunits, the constituent parts out 1217 01:09:52,646 --> 01:09:57,985 of which they're made, are arranged in very specific ways. 1218 01:10:02,948 --> 01:10:05,075 And there's 20 amino acids in the same way 1219 01:10:05,159 --> 01:10:07,703 that you've got 26 letters in the alphabet. 1220 01:10:07,786 --> 01:10:09,538 So, the order of the amino acids 1221 01:10:09,663 --> 01:10:12,374 in a protein is like the letters in a sentence. 1222 01:10:12,416 --> 01:10:13,876 They have to be in the right order to work. 1223 01:10:16,378 --> 01:10:18,797 But what causes the amino acids 1224 01:10:18,881 --> 01:10:23,093 to get arranged properly so that they will fold properly 1225 01:10:23,135 --> 01:10:24,136 into the right shapes? 1226 01:10:26,722 --> 01:10:29,475 And the answer to that was the discovery 1227 01:10:29,516 --> 01:10:32,645 that the DNA molecule contains information... 1228 01:10:36,315 --> 01:10:39,693 instructions for directing the construction 1229 01:10:39,735 --> 01:10:42,655 of those protein molecules that do all those important jobs. 1230 01:10:44,365 --> 01:10:45,574 In those stretches of DNA, 1231 01:10:45,616 --> 01:10:48,994 you have very particular sequences of A's, C's, G's, 1232 01:10:49,078 --> 01:10:54,416 and T's that tell cells how to make amino acid sequences 1233 01:10:54,500 --> 01:10:57,378 that fold and become functional proteins. 1234 01:10:58,420 --> 01:11:01,423 And molecular biologists now have a very good understanding 1235 01:11:01,465 --> 01:11:04,134 of how the information in DNA directs the process 1236 01:11:04,218 --> 01:11:05,302 of protein synthesis. 1237 01:11:07,137 --> 01:11:11,016 First, the cell uses a large protein machine called a polymerase 1238 01:11:11,058 --> 01:11:14,061 to make a copy of the information on the DNA. 1239 01:11:14,144 --> 01:11:17,690 The polymerase separates the DNA into two strands. 1240 01:11:17,731 --> 01:11:19,692 One strand serves as a template for creating 1241 01:11:19,733 --> 01:11:22,111 a complementary RNA copy. 1242 01:11:22,194 --> 01:11:26,115 The resulting copy, called a messenger RNA transcript, 1243 01:11:26,156 --> 01:11:28,409 detaches and then approaches and passes 1244 01:11:28,450 --> 01:11:30,160 through the nuclear pore complex. 1245 01:11:32,746 --> 01:11:35,958 Then the transcript with the genetic assembly instructions 1246 01:11:36,041 --> 01:11:39,128 arrives at a two-part chemical factory called the ribosome, 1247 01:11:39,169 --> 01:11:40,713 the site of protein synthesis. 1248 01:11:43,924 --> 01:11:47,720 As the messenger RNA transcript passes through the ribosome, 1249 01:11:47,803 --> 01:11:50,889 a mechanical assembly line builds a specifically sequenced chain 1250 01:11:50,973 --> 01:11:53,976 of amino acids using the instructions on the transcript. 1251 01:11:55,519 --> 01:11:57,855 These amino acids are transported to the ribosome 1252 01:11:57,896 --> 01:12:00,941 by molecules called transfer RNAs, 1253 01:12:01,025 --> 01:12:03,110 which link specific sequences of bases 1254 01:12:03,152 --> 01:12:06,447 to corresponding amino acids in accord with the genetic code. 1255 01:12:12,786 --> 01:12:15,414 The sequential arrangement of the amino acids determines 1256 01:12:15,497 --> 01:12:18,000 whether the chain will fold into a functional protein, 1257 01:12:18,083 --> 01:12:19,168 and if so, which type. 1258 01:12:29,595 --> 01:12:32,306 Once the chain is folded into a functional protein, 1259 01:12:32,389 --> 01:12:35,225 it is ready to perform its job inside the cell. 1260 01:12:45,569 --> 01:12:47,446 That's in fact what's going on inside cells. 1261 01:12:50,365 --> 01:12:52,117 The discovery meant 1262 01:12:52,201 --> 01:12:55,204 that you had to explain not just the origin 1263 01:12:55,245 --> 01:12:58,874 of the cell viewed as a kind of amorphous blob, 1264 01:13:02,044 --> 01:13:06,799 but rather as an enclosure of a sophisticated information 1265 01:13:06,882 --> 01:13:11,678 storage device and a sophisticated information transmission 1266 01:13:11,762 --> 01:13:12,971 and processing system. 1267 01:13:17,101 --> 01:13:18,977 They inherited all the traits 1268 01:13:19,061 --> 01:13:20,395 of the cell they came from. 1269 01:13:22,564 --> 01:13:26,735 And this same sort of process goes on in all living creatures. 1270 01:13:26,819 --> 01:13:28,695 It's not just a bunch of protoplasm anymore. 1271 01:13:29,863 --> 01:13:32,574 The cell is utterly amazing. 1272 01:13:32,658 --> 01:13:36,662 How can you look at this and not think, 1273 01:13:36,745 --> 01:13:38,747 how in the world did this start? 1274 01:13:38,789 --> 01:13:42,751 Because molecules don't come together to do that on their own. 1275 01:13:46,588 --> 01:13:47,965 OK. 1276 01:13:48,006 --> 01:13:51,343 But what I'd like to know is, where'd the first cell come from? 1277 01:13:51,426 --> 01:13:55,013 In a way, you're asking where life itself began. 1278 01:13:55,097 --> 01:13:56,098 We don't know that. 1279 01:14:08,402 --> 01:14:12,030 I first encountered the mystery about the origin 1280 01:14:12,072 --> 01:14:14,741 of the first life at a conference that I attended 1281 01:14:14,783 --> 01:14:16,034 when I was a young scientist. 1282 01:14:17,494 --> 01:14:20,622 There was a discussion between scientists 1283 01:14:20,664 --> 01:14:25,627 who were committed to the standard chemical evolutionary model 1284 01:14:25,711 --> 01:14:28,505 for how life arose from simpler chemicals 1285 01:14:28,547 --> 01:14:31,466 in the so-called prebiotic soup, 1286 01:14:31,508 --> 01:14:33,719 and other scientists who had become skeptical 1287 01:14:33,802 --> 01:14:34,803 of the standard model. 1288 01:14:38,390 --> 01:14:40,934 One of those scientists on the panel was a man named Dean 1289 01:14:41,018 --> 01:14:46,773 Kenyon, a biophysicist with a Stanford PhD, he'd worked at NASA, 1290 01:14:46,815 --> 01:14:49,610 and he'd written the best- selling advanced graduate-level 1291 01:14:49,693 --> 01:14:56,283 textbook on how life first arose from these prebiotic chemicals, 1292 01:14:57,701 --> 01:14:59,369 "Biochemical Predestination". 1293 01:15:00,496 --> 01:15:01,997 But leading up to the conference, 1294 01:15:02,080 --> 01:15:03,790 he began to doubt his own theory. 1295 01:15:05,334 --> 01:15:06,793 My own research work on origin 1296 01:15:06,835 --> 01:15:10,547 of first life was one of the main factors 1297 01:15:10,589 --> 01:15:15,344 that led me to begin to question this general viewpoint 1298 01:15:15,385 --> 01:15:16,845 about origins. 1299 01:15:18,764 --> 01:15:21,266 As time went on there, I began to be more aware 1300 01:15:21,308 --> 01:15:23,477 of some of the problems involved. 1301 01:15:27,022 --> 01:15:30,984 Actually, some students brought me a book in which my own work, 1302 01:15:31,068 --> 01:15:33,779 "Biochemical Predestination", was critiqued. 1303 01:15:33,820 --> 01:15:37,407 I thought I could easily refute this refutation of my work. 1304 01:15:37,491 --> 01:15:39,117 And so, I said, "Well, I'll take the summer 1305 01:15:39,201 --> 01:15:40,035 to look at this material. 1306 01:15:40,118 --> 01:15:41,119 It looks very interesting.” 1307 01:15:42,996 --> 01:15:46,041 Here, the question of origin of genetic information 1308 01:15:46,083 --> 01:15:47,751 looked increasingly problematical. 1309 01:15:49,586 --> 01:15:52,005 By the time the summer was over, I had decided 1310 01:15:52,047 --> 01:15:54,967 that I could not refute this criticism. 1311 01:15:56,134 --> 01:16:00,389 Things added up to the time for a critical reexamination. 1312 01:16:02,307 --> 01:16:06,436 And his old idea was that the subunits 1313 01:16:06,478 --> 01:16:10,565 of the large information- carrying biological molecules, 1314 01:16:10,649 --> 01:16:14,111 like the proteins and the DNA, would have self-organized 1315 01:16:14,194 --> 01:16:18,407 because of forces of attraction between the constituent parts 1316 01:16:18,490 --> 01:16:20,867 of those large molecules. 1317 01:16:22,619 --> 01:16:26,039 In chemistry, sodium and chloride combine to form salt. 1318 01:16:26,081 --> 01:16:28,041 NA has a plus charge. 1319 01:16:28,083 --> 01:16:29,668 Cl has a minus charge. 1320 01:16:29,751 --> 01:16:33,171 They attract, and they form a nicely ordered crystal lattice. 1321 01:16:34,464 --> 01:16:37,426 However, as he got deeply into the chemistry, 1322 01:16:37,467 --> 01:16:40,470 Kenyon realized that DNA wasn't that kind of molecule. 1323 01:16:40,512 --> 01:16:44,141 In the DNA molecule, we have A, T, C, and G. 1324 01:16:44,182 --> 01:16:48,353 And the specific order in which they occur does not depend 1325 01:16:48,395 --> 01:16:51,231 on the chemical binding affinities 1326 01:16:51,273 --> 01:16:53,859 between or among those various bases. 1327 01:16:56,069 --> 01:16:57,738 I used to use a visual illustration 1328 01:16:57,779 --> 01:17:01,074 with my students to get the idea across. 1329 01:17:01,116 --> 01:17:03,285 I would use a little magnetic chalkboard 1330 01:17:03,368 --> 01:17:06,121 and stick letters to it, magnetic letters. 1331 01:17:06,163 --> 01:17:08,332 In the case of the magnetic letters in the chalkboard, 1332 01:17:08,415 --> 01:17:10,459 there were magnetic forces that explained 1333 01:17:10,500 --> 01:17:12,461 why the letters stuck to the backboard. 1334 01:17:13,545 --> 01:17:17,507 But those forces didn't explain the arrangement of the letters 1335 01:17:17,549 --> 01:17:18,800 that spelled out some message. 1336 01:17:20,510 --> 01:17:24,890 Instead, that was explained only by an exogenous source 1337 01:17:24,973 --> 01:17:27,809 of information, namely, I had arranged the letters. 1338 01:17:29,186 --> 01:17:31,605 So, the magnetic forces explain why the letters stuck 1339 01:17:31,688 --> 01:17:34,775 to the backboard, but not their arrangement. 1340 01:17:34,816 --> 01:17:38,195 And in the same way, there are forces of attraction in DNA 1341 01:17:38,278 --> 01:17:39,738 that explain why the bases stick 1342 01:17:39,780 --> 01:17:42,366 to the sugar phosphate backbone, 1343 01:17:42,449 --> 01:17:45,577 but not forces that explain the arrangement of the characters. 1344 01:17:47,120 --> 01:17:49,289 And so, my doubt just reached, I guess, 1345 01:17:49,373 --> 01:17:51,500 for me, the intellectual breaking point. 1346 01:17:53,335 --> 01:17:57,589 If one could get at the origin of the messages, 1347 01:17:57,672 --> 01:18:00,842 the encoded messages within the living machinery, 1348 01:18:00,884 --> 01:18:05,389 then you would really be on to something far more intellectually 1349 01:18:05,472 --> 01:18:08,934 satisfying than this chemical evolution theory. 1350 01:18:10,394 --> 01:18:12,020 And at this conference, 1351 01:18:12,104 --> 01:18:14,523 he publicly repudiated his own theory. 1352 01:18:14,564 --> 01:18:17,025 I don't think you have to jump off the end 1353 01:18:17,109 --> 01:18:19,403 of the rational world to move in the direction 1354 01:18:19,486 --> 01:18:22,197 of a frankly theistic understanding of the origin of life. 1355 01:18:25,575 --> 01:18:27,411 Since Kenyon announced his doubts, 1356 01:18:27,494 --> 01:18:28,829 there have been many other attempts 1357 01:18:28,870 --> 01:18:32,707 to simulate how the molecular compounds necessary for life, 1358 01:18:32,749 --> 01:18:37,129 like proteins and DNA, or even simpler chemical building blocks 1359 01:18:37,212 --> 01:18:39,423 of those compounds, might have evolved 1360 01:18:39,464 --> 01:18:43,260 under realistic prebiotic conditions on the early Earth. 1361 01:18:43,343 --> 01:18:47,222 But those laboratory simulations invariably require a cheat. 1362 01:18:48,515 --> 01:18:49,516 Human interference. 1363 01:18:51,351 --> 01:18:55,021 When you do organic synthesis, when you make a compound, 1364 01:18:55,105 --> 01:18:57,858 you need to generally start with pure compounds 1365 01:18:57,899 --> 01:19:01,486 because the impurities cause a lot 1366 01:19:01,528 --> 01:19:04,156 of deleterious reactions to occur. 1367 01:19:05,157 --> 01:19:08,410 Once you've made your compound, you've got to stop it 1368 01:19:08,493 --> 01:19:11,496 at exactly the right time before it decomposes, 1369 01:19:11,580 --> 01:19:12,664 more human interference. 1370 01:19:13,832 --> 01:19:16,751 Now, what you have to do is you have to separate it 1371 01:19:16,793 --> 01:19:20,088 from all the other compounds that formed. 1372 01:19:20,130 --> 01:19:23,550 Separations are really hard, really hard. 1373 01:19:23,633 --> 01:19:24,843 Huge human involvement. 1374 01:19:24,926 --> 01:19:26,970 Now you have to identify it. 1375 01:19:27,053 --> 01:19:31,057 You have to know what it is and characterize it 1376 01:19:31,141 --> 01:19:33,852 in order to bring it on to the next step. 1377 01:19:33,935 --> 01:19:34,936 How do you go on? 1378 01:19:36,188 --> 01:19:39,399 And the poor early Earth was mindless. 1379 01:19:39,441 --> 01:19:42,068 It didn't know what it was supposed to make. 1380 01:19:42,110 --> 01:19:45,363 Molecules have never been known to move toward life. 1381 01:19:45,405 --> 01:19:46,740 Never, ever, ever. 1382 01:19:46,781 --> 01:19:49,659 Molecules don't evolve toward life. They don't. 1383 01:19:49,743 --> 01:19:53,121 Attempts to simulate how life could have arisen 1384 01:19:53,163 --> 01:19:56,500 from a prebiotic environment involve an element 1385 01:19:56,541 --> 01:19:58,543 that never gets acknowledged. 1386 01:19:58,627 --> 01:20:01,463 And that element is intelligence. 1387 01:20:01,505 --> 01:20:04,549 We need to address more fundamental questions. 1388 01:20:04,633 --> 01:20:06,718 What's the origin of the code? 1389 01:20:11,348 --> 01:20:14,100 And I know that philosophers of science 1390 01:20:14,184 --> 01:20:17,646 and scientists find it difficult to really grasp what 1391 01:20:17,729 --> 01:20:21,942 information is because it has a couple of levels. 1392 01:20:22,025 --> 01:20:24,110 In classical information theory, 1393 01:20:24,194 --> 01:20:27,781 there isn't a way to distinguish a series of symbols 1394 01:20:27,822 --> 01:20:33,036 that are merely improbable from a series of symbols 1395 01:20:33,119 --> 01:20:36,373 that are improbable and also functional. 1396 01:20:39,167 --> 01:20:42,671 The difference between the monkey typing out random gibberish, 1397 01:20:42,754 --> 01:20:45,924 which would be a highly complex arrangement of characters, 1398 01:20:46,007 --> 01:20:47,884 but not one that conveys any meaning 1399 01:20:47,926 --> 01:20:50,053 or performs a communication function, 1400 01:20:50,136 --> 01:20:51,930 and, say, a line of poetry, like, 1401 01:20:52,013 --> 01:20:54,224 "Time and tide wait for no man.” 1402 01:20:54,266 --> 01:20:58,019 If you compare those two symbol strings side by side, 1403 01:20:58,103 --> 01:21:01,064 you'll see that they both are highly improbable. 1404 01:21:02,899 --> 01:21:05,360 But something is present in the one string 1405 01:21:05,443 --> 01:21:07,279 of characters that's not present in the other. 1406 01:21:07,320 --> 01:21:08,697 And that's what we call specificity. 1407 01:21:09,823 --> 01:21:12,659 Or sometimes it's called specified complexity. 1408 01:21:12,701 --> 01:21:15,787 The arrangement of the characters is specific 1409 01:21:15,871 --> 01:21:17,289 to perform a function. 1410 01:21:19,332 --> 01:21:20,625 Now, what's interesting in life, 1411 01:21:20,709 --> 01:21:22,544 you have things that are not just complex and 1412 01:21:22,586 --> 01:21:24,337 that there's lots of parts, it's 1413 01:21:24,379 --> 01:21:26,339 that they're arranged in a particular way 1414 01:21:26,423 --> 01:21:29,259 that allows them to do something remarkable. 1415 01:21:29,342 --> 01:21:31,761 And that is the thing that makes the complexity 1416 01:21:31,803 --> 01:21:33,305 not just ordinary complexity... 1417 01:21:35,682 --> 01:21:37,309 but specified complexity. 1418 01:21:40,061 --> 01:21:43,315 And DNA is a great example of specified complexity. 1419 01:21:45,692 --> 01:21:48,903 And when we're talking about information contained 1420 01:21:48,987 --> 01:21:52,657 in the genetic code in DNA, we are talking 1421 01:21:52,741 --> 01:21:56,202 about a level of semantic information. 1422 01:21:56,244 --> 01:22:01,666 Because in DNA, the sequence is coding for something. 1423 01:22:01,750 --> 01:22:04,210 In that sense, it has meaning. 1424 01:22:04,252 --> 01:22:06,087 A scientist named Henry Quastler, 1425 01:22:07,422 --> 01:22:11,176 who was one of the pioneers in applying the information sciences 1426 01:22:11,259 --> 01:22:15,263 to analyzing the information that's stored in DNA, he says, 1427 01:22:15,305 --> 01:22:19,643 "The creation of new information is habitually associated 1428 01:22:19,684 --> 01:22:20,727 with conscious activity.” 1429 01:22:23,188 --> 01:22:25,523 We associate information 1430 01:22:26,858 --> 01:22:30,737 with a rational intelligence behind it. 1431 01:22:30,820 --> 01:22:32,614 That's true at all levels. 1432 01:22:32,697 --> 01:22:35,075 And as we grow up, we learn. 1433 01:22:35,116 --> 01:22:35,992 We read books. 1434 01:22:36,076 --> 01:22:37,452 We see words. 1435 01:22:37,535 --> 01:22:39,245 We learn language. 1436 01:22:39,287 --> 01:22:42,207 And everything points towards the fact 1437 01:22:42,290 --> 01:22:46,419 that this does not arise spontaneously. 1438 01:22:46,461 --> 01:22:48,505 Bill Gates says that DNA is like a software 1439 01:22:48,546 --> 01:22:52,509 program, only much more complex than any we've ever created. 1440 01:22:52,550 --> 01:22:54,886 What do we know about the origin of software? 1441 01:22:54,969 --> 01:22:56,846 It always comes from a mind, from a programmer. 1442 01:22:56,930 --> 01:22:59,057 In fact, whenever we see information 1443 01:22:59,099 --> 01:23:00,392 and we trace it back to its source, 1444 01:23:00,475 --> 01:23:02,894 whether we're looking at a section of software code 1445 01:23:02,936 --> 01:23:06,272 or a hieroglyphic inscription or a paragraph in a book 1446 01:23:06,314 --> 01:23:08,108 or information embedded in a radio signal, 1447 01:23:08,191 --> 01:23:11,152 if we trace the information back to its ultimate source, 1448 01:23:11,236 --> 01:23:14,072 we always come to a mind, not a material process. 1449 01:23:14,155 --> 01:23:16,658 So, the discovery of information in a digital 1450 01:23:16,700 --> 01:23:19,285 or alphabetic form at the foundation of life 1451 01:23:19,327 --> 01:23:23,540 in molecules like DNA and RNA is a powerful indicator 1452 01:23:23,665 --> 01:23:26,334 of a designing intelligence playing a role in the origin 1453 01:23:26,418 --> 01:23:29,003 of that information, and therefore in the origin of life itself. 1454 01:23:30,964 --> 01:23:33,842 That's where all our experience 1455 01:23:33,883 --> 01:23:35,051 of the universe points. 1456 01:23:35,093 --> 01:23:39,723 We see the word exit, immediately we infer to a mind behind it. 1457 01:23:39,764 --> 01:23:45,270 A Chinese archaeologist sees a couple of strokes on the wall 1458 01:23:45,311 --> 01:23:48,481 of a cave and says, "Human intelligence.” 1459 01:23:48,565 --> 01:23:51,317 And I say, "Don't be so stupid, two strokes.” 1460 01:23:51,359 --> 01:23:54,821 Ah, yes, but they are the Chinese symbol for a human being. 1461 01:23:54,863 --> 01:23:58,199 And so, there must have been an intelligence behind that. 1462 01:23:59,701 --> 01:24:01,619 We look inside the cell. 1463 01:24:01,703 --> 01:24:04,456 We have a whole theory which describes 1464 01:24:04,539 --> 01:24:06,374 these controlled transfers of information. 1465 01:24:07,500 --> 01:24:10,211 And the only examples we know of this sort 1466 01:24:10,253 --> 01:24:14,716 of controlled transfers of information is systems 1467 01:24:14,758 --> 01:24:17,177 that intelligent agents have developed. 1468 01:24:17,260 --> 01:24:19,763 When we look at how information gets processed 1469 01:24:19,846 --> 01:24:25,727 in the cell, you get the string of information being ejected out 1470 01:24:25,810 --> 01:24:28,772 of the nucleus, but that string of information 1471 01:24:28,813 --> 01:24:32,025 on its own does not give you, in any way, shape, 1472 01:24:32,108 --> 01:24:35,028 or form, the product we need to get work done. 1473 01:24:35,111 --> 01:24:38,406 It has to be picked up by another mechanism 1474 01:24:38,448 --> 01:24:41,034 that knows how to read that string 1475 01:24:41,076 --> 01:24:45,913 and convert what it sees there into what is needed over here 1476 01:24:45,914 --> 01:24:49,417 to get the work done that that thing over there needs. 1477 01:24:49,501 --> 01:24:51,878 That gave me pause and made me go, 1478 01:24:51,920 --> 01:24:54,172 "Wait a minute, I've seen this before.” 1479 01:24:55,465 --> 01:24:58,176 We do this all the time in computer science. 1480 01:24:58,259 --> 01:25:01,971 Some of the ideas that we were seeing in biology 1481 01:25:02,013 --> 01:25:06,893 that resonated with me were such notions as error correction. 1482 01:25:06,976 --> 01:25:07,602 By any chance, 1483 01:25:07,685 --> 01:25:10,897 if there's something that is done incorrectly, 1484 01:25:10,939 --> 01:25:13,399 there's even another protein that's able 1485 01:25:13,441 --> 01:25:15,860 to proofread and fix this. 1486 01:25:29,207 --> 01:25:32,168 The existing code can be recoded, 1487 01:25:32,252 --> 01:25:35,004 it can be rewritten, it can be edited on the fly. 1488 01:25:36,422 --> 01:25:38,216 The information processing system 1489 01:25:38,299 --> 01:25:41,511 in the cell uses design strategies reminiscent 1490 01:25:41,553 --> 01:25:45,223 of high-tech digital computing with one key difference. 1491 01:25:45,265 --> 01:25:47,433 The design logic in the cell exceeds anything 1492 01:25:47,517 --> 01:25:48,935 human engineers have produced. 1493 01:25:51,563 --> 01:25:55,441 We know now that DNA, 1494 01:25:55,483 --> 01:25:58,278 you can read it once in one direction. 1495 01:25:59,654 --> 01:26:01,406 You can read it in that direction again, 1496 01:26:01,447 --> 01:26:06,161 but if you start here, you get a different gene expressed than 1497 01:26:06,244 --> 01:26:09,998 if you start here, even though those overlap. 1498 01:26:10,039 --> 01:26:13,167 You can read the same segment of DNA forward 1499 01:26:13,251 --> 01:26:16,004 to get one protein and backwards to get another. 1500 01:26:16,045 --> 01:26:20,967 We've never been able to yet make anything like 1501 01:26:21,050 --> 01:26:23,761 that happen with computers. 1502 01:26:23,845 --> 01:26:25,722 The code in the computer program, 1503 01:26:25,763 --> 01:26:27,599 it only does one thing. 1504 01:26:27,682 --> 01:26:29,434 You can't read it back and forth. 1505 01:26:29,475 --> 01:26:31,769 You read it one way, and that's what it does. 1506 01:26:31,811 --> 01:26:32,812 That's all it does. 1507 01:26:33,938 --> 01:26:37,817 In DNA, we have codes within codes within codes. 1508 01:26:37,901 --> 01:26:39,527 They're interdigitated. 1509 01:26:39,569 --> 01:26:43,323 They are multi-level, overlapping. 1510 01:26:43,364 --> 01:26:47,702 We're dealing with a system that exhibits 1511 01:26:49,162 --> 01:26:52,165 a manifold complex design. 1512 01:26:53,666 --> 01:26:56,502 The level of complexity that we see, 1513 01:26:59,172 --> 01:27:04,385 I stand back and go, "Wow, that's really elegant.” 1514 01:27:11,392 --> 01:27:14,187 As soon as the immense miracle 1515 01:27:14,270 --> 01:27:18,191 of the cell is exposed, it's an ongoing process. 1516 01:27:18,274 --> 01:27:21,819 We're far from a complete description of even the simplest cell. 1517 01:27:22,862 --> 01:27:25,239 We see these are not random structures. 1518 01:27:25,323 --> 01:27:27,575 They haven't been cobbled together. 1519 01:27:27,617 --> 01:27:29,077 They haven't been pieced together 1520 01:27:29,118 --> 01:27:32,580 by some sort of stochastic mechanism. 1521 01:27:32,664 --> 01:27:36,084 They're exquisitely and ingeniously put together 1522 01:27:36,167 --> 01:27:38,294 in a certain way, and if they're not put together 1523 01:27:38,378 --> 01:27:41,130 in that certain way, they don't work. 1524 01:28:00,316 --> 01:28:01,734 Let's take a look at what's 1525 01:28:01,818 --> 01:28:03,152 around us on planet Earth. 1526 01:28:05,238 --> 01:28:10,284 Do we see what looks like the bare bones, minimalistic, 1527 01:28:11,619 --> 01:28:13,579 cobbling together something by accident 1528 01:28:13,621 --> 01:28:15,623 for the sheer purpose of ruthless survival? 1529 01:28:20,336 --> 01:28:24,090 Or do we see something much more extravagant, 1530 01:28:24,215 --> 01:28:26,342 beautiful in its expression? 1531 01:28:48,698 --> 01:28:51,034 This is actually a big problem in evolutionary biology. 1532 01:28:51,117 --> 01:28:53,494 It's called the problem of gratuitous beauty. 1533 01:28:55,663 --> 01:28:58,291 Many organisms have beauty beyond anything that's relevant 1534 01:28:58,332 --> 01:28:59,333 for their survival. 1535 01:29:08,634 --> 01:29:10,970 This deserves an explanation. 1536 01:29:11,054 --> 01:29:13,765 Many people have tried to give a utilitarian explanation. 1537 01:29:13,848 --> 01:29:16,476 Oh, yeah, well, it's some adaptive reason, 1538 01:29:16,559 --> 01:29:18,603 or there's some sexual selection. 1539 01:29:18,686 --> 01:29:21,147 But I think the answer requires something more. 1540 01:29:22,398 --> 01:29:24,650 The one who realized the answer requires 1541 01:29:24,734 --> 01:29:26,652 something more was Aristotle. 1542 01:29:26,736 --> 01:29:31,491 He said, "No, it's the result of some kind of rational structure 1543 01:29:31,532 --> 01:29:34,494 to the universe, dare say even an intelligence.” 1544 01:29:37,872 --> 01:29:41,542 So, the exuberance is one that appears 1545 01:29:41,584 --> 01:29:45,171 to be designed to elicit our attention. 1546 01:29:52,887 --> 01:29:55,473 It's one that seems to be reaching out to us. 1547 01:29:57,350 --> 01:29:59,310 Now, here I am waxing. 1548 01:29:59,352 --> 01:30:00,728 It would seem to be mystical. 1549 01:30:10,696 --> 01:30:14,575 I must say that these are observations, 1550 01:30:14,659 --> 01:30:17,787 they're appeals to intuition, but not to be dismissed 1551 01:30:17,870 --> 01:30:18,871 for that reason. 1552 01:30:19,622 --> 01:30:20,748 Not to be dismissed. 1553 01:30:20,790 --> 01:30:22,542 There's something interesting going on. 1554 01:30:25,002 --> 01:30:26,003 There's something in science 1555 01:30:26,087 --> 01:30:27,755 called the beauty principle 1556 01:30:27,839 --> 01:30:31,634 that says true theories often convey a mathematical beauty 1557 01:30:31,676 --> 01:30:32,802 or structural harmony. 1558 01:30:36,222 --> 01:30:40,184 Upon looking at their model of the DNA molecule, 1559 01:30:40,351 --> 01:30:42,520 Francis Crick was quoted as saying, 1560 01:30:44,188 --> 01:30:47,066 "It's so beautiful, it's got to be right.” 1561 01:30:47,150 --> 01:30:49,318 You find that all the time in the literature 1562 01:30:49,402 --> 01:30:53,573 today, people saying, "Beauty is truth, and truth beauty.” 1563 01:30:53,614 --> 01:30:57,285 If we find a set of equations that is just beautiful, 1564 01:30:57,326 --> 01:30:58,578 then it must be true. 1565 01:31:05,042 --> 01:31:09,714 Sometimes the path toward the truth leads 1566 01:31:09,797 --> 01:31:10,798 through beauty. 1567 01:31:12,008 --> 01:31:13,801 And that is an important window. 1568 01:31:16,095 --> 01:31:17,597 We need to be willing to open that. 1569 01:31:21,017 --> 01:31:24,061 There's really two fundamental hypotheses 1570 01:31:24,103 --> 01:31:25,229 about reality. 1571 01:31:25,313 --> 01:31:31,152 One is that the story of everything is purpose, 1572 01:31:31,235 --> 01:31:34,030 that behind everything there is an author. 1573 01:31:35,364 --> 01:31:37,158 The alternative is that none of that is true. 1574 01:31:38,284 --> 01:31:41,704 We're the result of blind and impersonal processes 1575 01:31:41,787 --> 01:31:43,080 that did not have us in mind. 1576 01:31:44,373 --> 01:31:47,668 So, ultimately, these questions about the origin of matter, 1577 01:31:47,752 --> 01:31:50,838 the origin of life, the origin of the universe, 1578 01:31:52,048 --> 01:31:56,719 come down to that fundamental question and those two options. 1579 01:31:58,721 --> 01:32:01,891 Richard Dawkins has very famously said 1580 01:32:01,933 --> 01:32:04,268 that the universe has, at bottom, 1581 01:32:04,352 --> 01:32:09,982 just those properties one would expect if there were no design, 1582 01:32:10,024 --> 01:32:14,237 no purpose, only blind, pitiless indifference. 1583 01:32:15,529 --> 01:32:17,698 That's an interesting claim. 1584 01:32:17,782 --> 01:32:20,534 What I find interesting about it is that it's the right kind 1585 01:32:20,576 --> 01:32:22,536 of claim to be trying to make. 1586 01:32:22,578 --> 01:32:25,957 We want to take our metaphysical hypotheses 1587 01:32:26,040 --> 01:32:30,836 and see what consequences they have, what they point 1588 01:32:30,878 --> 01:32:34,423 to, how well they account for various things. 1589 01:32:34,507 --> 01:32:37,760 One of the most important questions any of us can ask, 1590 01:32:37,843 --> 01:32:41,555 when should I change my mind? 1591 01:32:41,639 --> 01:32:42,807 Or to put it a little bit differently, 1592 01:32:43,808 --> 01:32:46,227 if I am wrong, how am I going to find out? 1593 01:32:50,273 --> 01:32:52,733 Consider you're walking through the woods. 1594 01:32:54,986 --> 01:32:58,531 In a stretch of woods that you had thought totally uninhabited, 1595 01:32:58,572 --> 01:33:02,076 you stumble upon an old, sort of rundown cabin. 1596 01:33:04,620 --> 01:33:07,832 Looking at it, you think it's just a relic left 1597 01:33:07,915 --> 01:33:09,542 over from a long time ago. 1598 01:33:13,879 --> 01:33:17,341 Then you go up to the door, and you push it, and it opens. 1599 01:33:17,425 --> 01:33:21,304 And as you step inside, you see a cup of tea, 1600 01:33:22,638 --> 01:33:26,809 still hot, steeping on a little table 1601 01:33:26,851 --> 01:33:27,852 in the middle of the cabin. 1602 01:33:33,190 --> 01:33:36,193 When Richard Dawkins says the universe has exactly the features 1603 01:33:36,235 --> 01:33:40,364 that we would expect if there were at bottom no reason, 1604 01:33:40,448 --> 01:33:45,661 no purpose, what he's saying is that there should be no signs 1605 01:33:45,745 --> 01:33:47,079 of intelligence in the universe. 1606 01:33:50,082 --> 01:33:52,626 Where Dawkins goes wrong is that there actually is a cup 1607 01:33:52,668 --> 01:33:53,669 of tea on the table. 1608 01:33:56,505 --> 01:33:57,506 And so much more. 1609 01:33:58,799 --> 01:34:01,677 Recent scientific discoveries point in the direction 1610 01:34:01,719 --> 01:34:04,638 that none of the leading scientific materialists expected. 1611 01:34:07,266 --> 01:34:09,226 No one expected that the physical universe 1612 01:34:09,268 --> 01:34:11,479 of matter, space, time, and energy 1613 01:34:11,562 --> 01:34:13,564 would have a definite beginning. 1614 01:34:13,606 --> 01:34:16,192 No one expected that the universe would be finely tuned 1615 01:34:16,275 --> 01:34:18,361 against all odds to make life possible. 1616 01:34:20,488 --> 01:34:23,240 Dawkins himself has confessed to being knocked sideways 1617 01:34:23,324 --> 01:34:26,535 with wonder at the miniaturized intricacy 1618 01:34:26,577 --> 01:34:29,163 of the data processing machinery inside the cell. 1619 01:34:30,998 --> 01:34:33,542 We're not living in a vast, meaningless universe. 1620 01:34:34,668 --> 01:34:38,214 From the forces holding the cosmos together to the instructions 1621 01:34:38,297 --> 01:34:40,925 in the DNA in our own bodies, we see evidence 1622 01:34:41,008 --> 01:34:43,552 that everything was intended for a purpose, 1623 01:34:43,594 --> 01:34:45,554 that the story of everything is not blind, 1624 01:34:45,638 --> 01:34:48,933 pitiless indifference, but the unfolding of a grand design 1625 01:34:49,016 --> 01:34:50,601 that all of us are part of. 1626 01:34:50,684 --> 01:34:54,105 And surprisingly, perhaps, it is science that has revealed this. 1627 01:34:59,318 --> 01:35:01,654 Here is evidence for what can only 1628 01:35:01,737 --> 01:35:04,698 be described as a supernatural event. 1629 01:35:09,578 --> 01:35:11,538 I don't think you have to jump off the end 1630 01:35:11,539 --> 01:35:13,874 of the rational world to move in the direction 1631 01:35:13,916 --> 01:35:16,710 of a frankly theistic understanding of the origin of life. 1632 01:35:18,546 --> 01:35:21,298 Is there something else that we can imagine 1633 01:35:21,382 --> 01:35:23,467 that would lay these questions to rest? 1634 01:35:24,468 --> 01:35:25,469 I can't see it. 1635 01:35:26,887 --> 01:35:29,557 The question then was what does one do about it? 1636 01:35:31,475 --> 01:35:34,145 We might rethink the story of everything. 1637 01:35:38,232 --> 01:35:41,986 The universe does not look like it's been left to itself. 1638 01:35:46,365 --> 01:35:51,203 It bears everywhere the fingerprints of its creator. 135679

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