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These are the user uploaded subtitles that are being translated: 1 00:00:01,585 --> 00:00:04,588 [intense music] 2 00:00:06,924 --> 00:00:11,011 - We've all heard this advice, don't reinvent the wheel. 3 00:00:11,011 --> 00:00:15,182 Well, what if reinventing it turns the world upside down? 4 00:00:15,182 --> 00:00:19,937 Because sometimes a new machine can change the whole game. 5 00:00:19,937 --> 00:00:23,232 Tonight, the super structure 6 00:00:23,232 --> 00:00:26,360 that makes our survival in space possible. 7 00:00:26,360 --> 00:00:28,403 - They're in zero gravity. 8 00:00:28,403 --> 00:00:30,113 They're working out with the equivalent 9 00:00:30,113 --> 00:00:33,075 of 600 pounds of weight. 10 00:00:34,618 --> 00:00:37,079 - How about the garage-born tech 11 00:00:37,079 --> 00:00:39,414 that cracks the code on computers? 12 00:00:39,414 --> 00:00:41,124 - We have 21-year-old Steve Jobs 13 00:00:41,124 --> 00:00:44,294 and his buddy Steve Wozniak in Jobs's parents' garage 14 00:00:44,294 --> 00:00:48,549 building what Wozniak considers to be his masterpiece. 15 00:00:48,549 --> 00:00:50,259 - And Henry Ford 16 00:00:50,259 --> 00:00:53,637 revolutionizes the idea of what a car can be. 17 00:00:53,637 --> 00:00:57,724 - By 1925, every single person that's working on the line 18 00:00:57,724 --> 00:01:00,560 to build the Model T can also afford one. 19 00:01:00,560 --> 00:01:02,354 This is a game changer. 20 00:01:04,063 --> 00:01:05,566 - I'm Dolph Lundgren. 21 00:01:05,566 --> 00:01:07,734 On screen, I'm all about the action. 22 00:01:07,734 --> 00:01:10,487 But off screen, I have degrees in engineering. 23 00:01:10,487 --> 00:01:12,531 I even studied at MIT. 24 00:01:13,407 --> 00:01:16,743 I learned that machines and the people behind them 25 00:01:16,743 --> 00:01:19,371 can transform the world. 26 00:01:19,371 --> 00:01:24,126 Join me as I explore the gears, grit, and genius 27 00:01:24,126 --> 00:01:26,878 beyond history's greatest machines. 28 00:01:28,213 --> 00:01:31,466 [graphics whooshing] 29 00:01:37,889 --> 00:01:41,351 In the 15th century, knowledge is closely guarded, 30 00:01:41,351 --> 00:01:43,562 kept in handwritten manuscripts, 31 00:01:43,562 --> 00:01:45,564 controlled by those in power. 32 00:01:45,564 --> 00:01:47,357 Until a single invention 33 00:01:47,357 --> 00:01:50,068 breaks their stranglehold on information 34 00:01:50,068 --> 00:01:54,239 and allows ideas to suddenly spread like wildfire. 35 00:01:56,825 --> 00:01:58,076 - Back in medieval Europe, 36 00:01:58,076 --> 00:02:00,620 reading is basically a privilege, 37 00:02:00,620 --> 00:02:02,998 belonging to the aristocracy and the clergy. 38 00:02:04,166 --> 00:02:07,836 Literacy rates across Europe are not even 10%. 39 00:02:07,836 --> 00:02:09,128 - What illiteracy does 40 00:02:09,128 --> 00:02:11,715 is maintain a centuries-long power dynamic, 41 00:02:11,715 --> 00:02:14,551 creates a hierarchy that puts the nobility 42 00:02:14,551 --> 00:02:16,887 and religious leaders at the very top. 43 00:02:16,887 --> 00:02:18,639 - [Don] When the peasantry can't read, 44 00:02:18,639 --> 00:02:20,932 they can't communicate opposition. 45 00:02:20,932 --> 00:02:24,561 That means they can't share ideas of reform far and wide. 46 00:02:24,561 --> 00:02:27,105 This makes them much easier to control 47 00:02:27,105 --> 00:02:29,149 and preserves the status quo. 48 00:02:29,149 --> 00:02:31,652 - [Dolph] There's a reason most people don't read. 49 00:02:31,652 --> 00:02:33,362 They can't afford to. 50 00:02:33,362 --> 00:02:35,530 - If you're a standard laborer, 51 00:02:35,530 --> 00:02:39,743 a single book could cost as much as your wages 52 00:02:39,743 --> 00:02:41,870 for an entire year. 53 00:02:41,870 --> 00:02:45,082 - The price is so expensive because 54 00:02:45,082 --> 00:02:46,458 every book means 55 00:02:46,458 --> 00:02:50,170 painstakingly copying it by hand. 56 00:02:50,170 --> 00:02:52,756 Even the Bible is a luxury. 57 00:02:52,756 --> 00:02:55,676 It is too expensive for an average person to own. 58 00:02:55,676 --> 00:02:58,595 [intense music] 59 00:02:58,595 --> 00:03:00,138 - [Dolph] In 1440, 60 00:03:00,138 --> 00:03:03,016 one man invents a machine that will change all this. 61 00:03:03,016 --> 00:03:05,435 A German craftsman you've probably heard of, 62 00:03:05,435 --> 00:03:07,562 Johannes Gutenberg. 63 00:03:07,562 --> 00:03:09,481 - [Lance] Gutenberg comes from a well off merchant family 64 00:03:09,481 --> 00:03:11,149 in Mainz, Germany, 65 00:03:11,149 --> 00:03:13,944 and their primary business is minting coins for the church. 66 00:03:13,944 --> 00:03:15,445 - By 1428, 67 00:03:15,445 --> 00:03:18,156 social unrest strikes Mainz and the surrounding areas. 68 00:03:18,156 --> 00:03:20,367 - Craftsman's guilds are tired 69 00:03:20,367 --> 00:03:22,703 of the economic and political inequality 70 00:03:22,703 --> 00:03:24,746 at the hands of the ruling class, 71 00:03:24,746 --> 00:03:26,206 so they lead a revolt 72 00:03:26,206 --> 00:03:29,209 that sends the Gutenberg's into exile in France. 73 00:03:30,585 --> 00:03:32,671 - [Don] Gutenberg is stripped of his status and wealth. 74 00:03:32,671 --> 00:03:36,091 He gets a taste of what it's like to be on the other side. 75 00:03:36,091 --> 00:03:38,301 - [Lance] He sees firsthand, how knowledge and books 76 00:03:38,301 --> 00:03:41,012 are tightly controlled by the church and the ruling elite, 77 00:03:41,012 --> 00:03:43,098 and he becomes deeply resentful 78 00:03:43,098 --> 00:03:46,143 that knowledge belongs to only those with power. 79 00:03:46,143 --> 00:03:48,145 - [Hakeem] So Gutenberg gets an idea. 80 00:03:49,062 --> 00:03:50,522 What's the barrier to reading? 81 00:03:50,522 --> 00:03:52,649 It's cost and accessibility, 82 00:03:52,649 --> 00:03:55,235 and that's tied to how books are made. 83 00:03:55,235 --> 00:03:57,821 - [Dolph] Gutenberg's answer is bold, 84 00:03:57,821 --> 00:04:01,616 to print books on mass using a press. 85 00:04:01,616 --> 00:04:04,578 - Crude printing presses exist at the time, 86 00:04:04,578 --> 00:04:07,330 but they're not how we think of it these days. 87 00:04:07,330 --> 00:04:10,959 You would have to handcarve from wood 88 00:04:10,959 --> 00:04:13,795 each individual page. 89 00:04:13,795 --> 00:04:17,132 Furthermore, the wood wears out over time. 90 00:04:17,132 --> 00:04:20,218 [intense music] 91 00:04:20,218 --> 00:04:21,595 - [Dolph] Gutenberg's printing press 92 00:04:21,595 --> 00:04:23,597 is the size of a workbench, 93 00:04:23,597 --> 00:04:25,891 but weighs over 300 pounds. 94 00:04:26,349 --> 00:04:29,102 You need even pressure to print clearly, 95 00:04:29,102 --> 00:04:32,856 so he adapts the same kind of screw press to use at the time 96 00:04:32,856 --> 00:04:35,692 to squeeze olives and make olive oil. 97 00:04:35,692 --> 00:04:38,361 - The real magic though, is in the metal letters. 98 00:04:38,361 --> 00:04:41,448 - These metal letters can be placed into a plate 99 00:04:41,448 --> 00:04:43,283 in whatever configuration is needed. 100 00:04:44,326 --> 00:04:46,411 - [Hakeem] The type is assembled line by line 101 00:04:46,411 --> 00:04:48,663 to create an entire page layout. 102 00:04:48,663 --> 00:04:51,958 Combined these metal letters with ink, 103 00:04:51,958 --> 00:04:54,127 and the page is loaded onto a heavy plate 104 00:04:54,127 --> 00:04:56,296 which presses evenly on the paper 105 00:04:56,296 --> 00:04:59,591 delivering the ink type to the paper. 106 00:04:59,591 --> 00:05:02,010 - It's rapid, it's reliable, 107 00:05:02,010 --> 00:05:05,472 and most importantly, for mass media, it's cheap. 108 00:05:05,472 --> 00:05:06,807 - [Lance] The full process 109 00:05:06,807 --> 00:05:08,642 takes about two to three minutes per page, 110 00:05:08,642 --> 00:05:10,602 and that means that a skilled group of workers 111 00:05:10,602 --> 00:05:14,356 can print 250 to 300 pages in a day. 112 00:05:16,525 --> 00:05:18,985 - [Don] Gutenberg's first project is of course, the Bible. 113 00:05:18,985 --> 00:05:21,404 It's over 1200 pages long. 114 00:05:21,404 --> 00:05:24,241 Now at that pace, it would take about five to six days 115 00:05:24,241 --> 00:05:25,867 to complete a copy. 116 00:05:25,867 --> 00:05:27,202 At that time, 117 00:05:27,202 --> 00:05:29,496 it would take a writer around a year 118 00:05:29,496 --> 00:05:32,749 to hand ink a full copy of the Bible. 119 00:05:32,749 --> 00:05:34,543 - Gutenberg's Bibles are printed 120 00:05:34,543 --> 00:05:37,963 in this beautiful, black, gothic typeface. 121 00:05:37,963 --> 00:05:39,589 When they get released, 122 00:05:39,589 --> 00:05:42,843 they look so close to the original handwritten versions, 123 00:05:42,843 --> 00:05:44,469 people can't tell the difference. 124 00:05:45,762 --> 00:05:47,639 - [Dolph] But unfortunately for Gutenberg, 125 00:05:47,639 --> 00:05:50,392 there's no way to protect his IP. 126 00:05:50,392 --> 00:05:54,521 - His idea is so innovative, people are eager to steal it. 127 00:05:54,521 --> 00:05:56,565 This was a time before patents, 128 00:05:56,565 --> 00:05:59,568 so pretty much has no protection 129 00:05:59,568 --> 00:06:01,278 as other people move in 130 00:06:01,278 --> 00:06:04,447 to build on what he's done and steal his invention. 131 00:06:04,447 --> 00:06:07,409 - [Don] So Gutenberg doesn't profit and dies poor. 132 00:06:07,409 --> 00:06:11,204 But if his goal was to change the way books are made, 133 00:06:11,204 --> 00:06:12,831 and enable people to read more 134 00:06:12,831 --> 00:06:14,958 and share ideas far and wide, 135 00:06:15,709 --> 00:06:17,836 it's a huge success. 136 00:06:17,836 --> 00:06:20,380 - [Lance] In the decades that follow, literacy rates soar. 137 00:06:20,380 --> 00:06:22,424 Once less than 10%, they nearly triple 138 00:06:22,424 --> 00:06:24,426 in some urban areas. 139 00:06:24,426 --> 00:06:27,178 Books are affordable and widely available 140 00:06:27,178 --> 00:06:28,680 for the first time. 141 00:06:28,680 --> 00:06:30,682 - [Austin] Knowledge can spread throughout Europe. 142 00:06:30,682 --> 00:06:32,893 It begins with religious tracks 143 00:06:32,893 --> 00:06:34,686 like Martin Luther's "Ninety-five Theses," 144 00:06:34,686 --> 00:06:36,521 moves on to scientific documents 145 00:06:36,521 --> 00:06:39,065 like the works of Copernicus and Galileo. 146 00:06:39,065 --> 00:06:41,693 Pamphlets like Thomas Paine's "Common Sense," 147 00:06:41,693 --> 00:06:44,571 help cause the American Revolution. 148 00:06:44,571 --> 00:06:46,448 - Knowledge equals power, 149 00:06:46,448 --> 00:06:49,576 and it's all possible because of this machine. 150 00:06:50,910 --> 00:06:54,581 - The printing press brought ideas to the masses. 151 00:06:54,581 --> 00:06:56,750 Fast forward over 500 years 152 00:06:56,750 --> 00:06:59,794 to the mid 20th century in Silicon Valley. 153 00:06:59,794 --> 00:07:03,632 The revolution is no longer about sharing ideas. 154 00:07:03,632 --> 00:07:05,884 It's about creating your own. 155 00:07:05,884 --> 00:07:08,261 [intense music] 156 00:07:08,261 --> 00:07:11,181 - [Don] It's 1967 in Palo Alto, California. 157 00:07:11,181 --> 00:07:13,725 Bill Hewlett, the co-founder of Hewlett-Packard, 158 00:07:13,725 --> 00:07:15,560 hears his home phone ring, 159 00:07:15,560 --> 00:07:18,188 and on the other end is a 12-year-old boy 160 00:07:18,188 --> 00:07:21,149 who is really excited to talk to him. 161 00:07:21,149 --> 00:07:24,402 - This kid is asking these extremely specific questions 162 00:07:24,402 --> 00:07:26,112 about frequency counters 163 00:07:26,112 --> 00:07:28,490 for some school project that he's working on. 164 00:07:28,490 --> 00:07:30,533 The kid really knows his stuff, 165 00:07:30,533 --> 00:07:32,160 and Bill is charmed by him 166 00:07:32,160 --> 00:07:35,080 because he has so much obvious enthusiasm 167 00:07:35,080 --> 00:07:36,373 for what he's doing. 168 00:07:36,498 --> 00:07:40,168 - He hears in the kid's voice something special. 169 00:07:40,168 --> 00:07:42,545 Hewlett tells the kid, "When you're of age and you're ready, 170 00:07:42,545 --> 00:07:45,507 I've got a summer job waiting for you at my factory." 171 00:07:45,507 --> 00:07:49,010 - [Dolph] That 12-year-old kid is Steve Jobs, 172 00:07:49,010 --> 00:07:50,970 a computer whiz, 173 00:07:50,970 --> 00:07:54,182 already showing business smarts that will make him famous. 174 00:07:55,767 --> 00:07:58,478 - [Sami] Less than 10 years after his call to Bill Hewlett, 175 00:07:58,478 --> 00:08:01,398 we have 21-year-old Steve Jobs and his buddy Steve Wozniak 176 00:08:01,398 --> 00:08:03,191 in Jobs's parents' garage, 177 00:08:03,191 --> 00:08:06,986 building what Wozniak considers to be his masterpiece, 178 00:08:06,986 --> 00:08:09,239 a personal computer. 179 00:08:09,239 --> 00:08:10,615 - At this point, 180 00:08:10,615 --> 00:08:14,035 computers have been enormous mainframe monsters 181 00:08:14,035 --> 00:08:16,246 that take up an entire floor, 182 00:08:16,246 --> 00:08:19,374 like the IBM used by NASA to put man on the moon. 183 00:08:19,374 --> 00:08:22,127 They were for calculating the enormous amounts of data 184 00:08:22,127 --> 00:08:24,879 that any large company needs to process. 185 00:08:24,879 --> 00:08:27,716 - [John] But Jobs has this idea that he wants to appeal 186 00:08:27,716 --> 00:08:29,843 to more than just hobbyists. 187 00:08:29,843 --> 00:08:31,970 He envisions a society 188 00:08:31,970 --> 00:08:35,682 where everybody has a computer in their home. 189 00:08:35,682 --> 00:08:37,558 - [Sami] Typically, when you're creating a product, 190 00:08:37,558 --> 00:08:39,644 what you're doing is you're trying to fulfill a need, 191 00:08:39,644 --> 00:08:42,856 but this is a market that doesn't exist yet, 192 00:08:42,856 --> 00:08:46,818 and Steve Jobs wants to will it into existence. 193 00:08:46,818 --> 00:08:49,195 - Just gonna be very gradual and very human, 194 00:08:49,195 --> 00:08:52,240 and we'll seduce you into learning how to use it. 195 00:08:52,240 --> 00:08:55,160 - Essentially, he's following the "Field of Dreams" rule, 196 00:08:55,160 --> 00:08:57,787 "If you build it, they will come." 197 00:08:58,747 --> 00:09:00,206 - [Austin] Wozniak works nights 198 00:09:00,206 --> 00:09:03,752 engineering the new computer basically by himself. 199 00:09:03,752 --> 00:09:06,546 He builds the circuit board by hand 200 00:09:06,546 --> 00:09:09,049 with no budget and minimal parts, 201 00:09:09,049 --> 00:09:13,386 always thinking to optimize for cost and simplicity. 202 00:09:13,386 --> 00:09:16,431 [intense music] 203 00:09:16,431 --> 00:09:18,475 - [Dolph] The result is the Apple II. 204 00:09:18,475 --> 00:09:20,602 Forget computer stuff fill a room. 205 00:09:20,602 --> 00:09:23,229 This one's just 15 inches wide, 206 00:09:23,229 --> 00:09:25,273 weighing 11-1/2 pounds. 207 00:09:25,273 --> 00:09:28,443 But the real genius is inside. 208 00:09:28,443 --> 00:09:30,361 - [Don] Inside, Apple II comes 209 00:09:30,361 --> 00:09:32,906 with a built-in software called Basic. 210 00:09:32,906 --> 00:09:35,033 This is simple programming language, 211 00:09:35,033 --> 00:09:37,660 and it allows users to create their own programs 212 00:09:37,660 --> 00:09:41,456 or run commercial software right out of the box. 213 00:09:41,456 --> 00:09:43,041 It's a big edge. 214 00:09:43,041 --> 00:09:46,586 - [Dolph] This other innovation, it's built to evolve. 215 00:09:46,586 --> 00:09:50,715 Inside are eight open slots ready for action. 216 00:09:50,715 --> 00:09:52,342 - [Sami] You can drop in a printer, 217 00:09:52,342 --> 00:09:53,676 you can drop in a modem, 218 00:09:53,676 --> 00:09:56,304 you can use floppy discs for extra memory. 219 00:09:56,304 --> 00:09:58,848 It's not just a machine, it's a foundation. 220 00:09:58,848 --> 00:10:01,434 Woz has essentially created something 221 00:10:01,434 --> 00:10:03,228 that can grow with you. 222 00:10:03,228 --> 00:10:05,146 - But the real coup de gras, 223 00:10:05,146 --> 00:10:10,026 Woz devises a way to produce full color graphics. 224 00:10:10,026 --> 00:10:12,153 - [Dolph] The Apple II does 225 00:10:12,153 --> 00:10:13,780 what feels like a magic trick at the time. 226 00:10:13,780 --> 00:10:16,658 It generates patterns of black and white dots, 227 00:10:16,658 --> 00:10:20,286 and then the circuitry already in all color TVs 228 00:10:20,286 --> 00:10:23,123 interprets these patterns as color. 229 00:10:24,207 --> 00:10:25,750 [intense music] 230 00:10:25,750 --> 00:10:29,129 In June 1977, the Apple II hits the market. 231 00:10:29,129 --> 00:10:31,005 Computer buffs rush to buy it, 232 00:10:31,005 --> 00:10:32,924 and the inventors get an assist 233 00:10:32,924 --> 00:10:36,219 that helps Apple II go mainstream. 234 00:10:36,219 --> 00:10:39,556 - Because anyone can develop software for Apple II, 235 00:10:39,556 --> 00:10:41,141 another company takes a run at it 236 00:10:41,141 --> 00:10:44,227 and they invent VisiCalc, the spreadsheet software 237 00:10:44,227 --> 00:10:47,313 and it becomes the Apple II's killer app. 238 00:10:47,313 --> 00:10:50,441 - [Don] A spreadsheet program seems so normal to us now, 239 00:10:50,441 --> 00:10:51,818 but it wasn't back then. 240 00:10:51,818 --> 00:10:53,820 It's what changes Apple II 241 00:10:53,820 --> 00:10:56,489 from being something that sits in the home of a hobbyist, 242 00:10:56,489 --> 00:10:59,868 into something that's sitting on the desk in every office. 243 00:10:59,868 --> 00:11:01,578 - [Sami] The Apple II still retails 244 00:11:01,578 --> 00:11:04,372 anywhere from 1,300 to $2,600 245 00:11:04,372 --> 00:11:06,291 depending on how much memory is put into the computer. 246 00:11:06,291 --> 00:11:08,877 In today's money, that'd be equivalent to about 247 00:11:08,877 --> 00:11:11,671 anywhere from 6 to $13,000. 248 00:11:11,671 --> 00:11:13,339 - [Dolph] Expensive? Maybe. 249 00:11:13,339 --> 00:11:16,676 But that doesn't stop people from opening their wallets. 250 00:11:16,676 --> 00:11:17,969 By the end of 1980, 251 00:11:17,969 --> 00:11:21,639 Apple sells over 100,000 Apple II units. 252 00:11:21,639 --> 00:11:25,935 In the coming years, that number climbs to 6 million. 253 00:11:27,270 --> 00:11:30,398 - [Sami] The Apple II is more than a computer. 254 00:11:30,398 --> 00:11:33,193 It is essentially the tip of the spear 255 00:11:33,193 --> 00:11:35,695 for a brand new technological revolution, 256 00:11:35,695 --> 00:11:38,573 which is personal computers. 257 00:11:38,573 --> 00:11:41,242 - If Gutenberg's Press made the world literate, 258 00:11:41,242 --> 00:11:44,412 then Apple II helps make the world computer literate. 259 00:11:44,412 --> 00:11:47,832 It takes this massive intimidating device 260 00:11:47,832 --> 00:11:50,460 and turns it into something friendly and accessible. 261 00:11:53,213 --> 00:11:55,048 - In combat, time is the real enemy, 262 00:11:55,048 --> 00:11:56,841 especially during the Civil War, 263 00:11:56,841 --> 00:12:00,970 when it takes forever to reload your musket after firing it. 264 00:12:00,970 --> 00:12:03,598 But what if there is something that could change all that, 265 00:12:03,598 --> 00:12:06,601 a rifle that could fire again and again, 266 00:12:06,601 --> 00:12:09,270 could it change the rules of engagement? 267 00:12:09,270 --> 00:12:11,981 Thanks to one young gunsmith, 268 00:12:11,981 --> 00:12:13,441 that's just what happens. 269 00:12:13,441 --> 00:12:16,361 [intense music] 270 00:12:16,361 --> 00:12:19,113 - [Hakeem] It's April 6, 1862, 271 00:12:19,113 --> 00:12:20,990 thousands of Confederate soldiers 272 00:12:20,990 --> 00:12:24,035 are creeping through the dense Tennessee woods. 273 00:12:24,035 --> 00:12:26,829 They sneak up on Ulysses S. Grant's army, 274 00:12:26,829 --> 00:12:30,875 and the forest explodes with fire and fury. 275 00:12:30,875 --> 00:12:34,128 - [Dolph] The Battle of Shiloh is about to begin. 276 00:12:34,128 --> 00:12:35,713 - It's a brutal surprise attack. 277 00:12:35,713 --> 00:12:39,092 Grant is struggling to bring order out of the chaos. 278 00:12:39,092 --> 00:12:40,635 - [John] Grant's troops are armed 279 00:12:40,635 --> 00:12:43,554 with a front-loading rifle musket. 280 00:12:43,554 --> 00:12:45,556 The problem with a rifle musket is, 281 00:12:45,556 --> 00:12:48,101 each time a volley is fired, 282 00:12:48,101 --> 00:12:51,479 it takes something like 20 to 30 seconds to reload it. 283 00:12:52,689 --> 00:12:55,608 - [Don] In the time it takes you to reload and fire, 284 00:12:55,608 --> 00:12:57,318 your enemy can close the distance 285 00:12:57,318 --> 00:12:59,195 and you end up with a bayonet in the chest. 286 00:12:59,195 --> 00:13:01,990 [intense music] 287 00:13:02,949 --> 00:13:04,951 - [Hakeem] The battle lasts for two days. 288 00:13:04,951 --> 00:13:07,161 And after he receives reinforcements, 289 00:13:07,161 --> 00:13:10,123 Grant is finally able to beat the Confederates back. 290 00:13:10,123 --> 00:13:13,001 But the death toll is astonishing. 291 00:13:14,085 --> 00:13:17,213 - [Dolph] 23,000 are dead or missing. 292 00:13:17,213 --> 00:13:20,675 The carnage teaches both Confederate and Union leadership 293 00:13:20,675 --> 00:13:22,760 that they need a faster rifle. 294 00:13:22,760 --> 00:13:25,346 Turns out one exists. 295 00:13:26,055 --> 00:13:28,308 - [John] Two years before the Battle of Shiloh, 296 00:13:28,308 --> 00:13:32,645 Christopher Miner Spencer, the 27-year-old gunsmith, 297 00:13:32,645 --> 00:13:34,439 patents a rifle that he thinks 298 00:13:34,439 --> 00:13:36,774 is going to change the nature of warfare. 299 00:13:36,774 --> 00:13:39,402 [intense music] 300 00:13:40,695 --> 00:13:43,364 - [Dolph] The Spencer repeating rifle holds seven rounds 301 00:13:43,364 --> 00:13:45,742 in a spring-loaded magazine. 302 00:13:45,742 --> 00:13:47,827 Every time the shooter fires, 303 00:13:47,827 --> 00:13:50,038 all he needs to do is the hammer 304 00:13:50,038 --> 00:13:53,499 then pull down the lever to advance the next round. 305 00:13:53,499 --> 00:13:55,418 [intense music] [gunshot fires] 306 00:13:55,418 --> 00:13:58,129 - Spencer's rifle uses preloaded cartridges 307 00:13:58,129 --> 00:14:01,466 that contain the gun powder as well as the round, 308 00:14:01,466 --> 00:14:04,052 and you load it into the back of the rifle 309 00:14:04,052 --> 00:14:05,803 - [Hakeem] In the 20 seconds it takes 310 00:14:05,803 --> 00:14:08,973 for an expert with a muzzle loader to reload, 311 00:14:08,973 --> 00:14:12,393 Spencer's rifle can fire seven times. 312 00:14:12,393 --> 00:14:14,896 That's a huge tactical advantage. 313 00:14:14,896 --> 00:14:18,441 [intense music] 314 00:14:18,441 --> 00:14:20,943 - [Don] By 1861, the Civil War breaks out, 315 00:14:20,943 --> 00:14:23,529 so he figures the Union Army's gonna be super excited 316 00:14:23,529 --> 00:14:25,615 to scoop up his new rifle. 317 00:14:25,615 --> 00:14:26,991 - [Dolph] He's wrong. 318 00:14:26,991 --> 00:14:29,911 The Union Army's bureaucracy moves slowly. 319 00:14:29,911 --> 00:14:32,622 So Spencer takes his rifle on the road, 320 00:14:32,622 --> 00:14:36,125 demonstrating it personally to Yankee commanders. 321 00:14:36,125 --> 00:14:40,630 One Colonel John T. Wilder of Indiana is intrigued. 322 00:14:40,630 --> 00:14:42,173 - [John] Colonel Wilder has seen 323 00:14:42,173 --> 00:14:44,133 what the Spencer repeating rifle can do, 324 00:14:44,133 --> 00:14:45,885 and he wants it for his unit. 325 00:14:45,885 --> 00:14:48,721 But the army isn't supplying these weapons, 326 00:14:48,721 --> 00:14:52,475 so he gets his men together and they pay for it themselves. 327 00:14:52,475 --> 00:14:55,436 [intense music] [cannons booming] 328 00:14:55,436 --> 00:14:59,565 - [Dolph] In June 1863, 14 months after Shiloh, 329 00:14:59,565 --> 00:15:03,111 Wilder and his men put the Spencer to the ultimate test 330 00:15:03,111 --> 00:15:05,655 at the Battle of Hoover's Gap. 331 00:15:05,655 --> 00:15:08,366 - [Don] The Confederates are expecting standard muskets 332 00:15:08,366 --> 00:15:09,784 and small arms. 333 00:15:09,784 --> 00:15:12,078 So they are absolutely stunned 334 00:15:12,078 --> 00:15:15,331 by the rapid firepower of Wilder's troops. 335 00:15:15,331 --> 00:15:17,041 - [John] Colonel Wilder's unit 336 00:15:17,041 --> 00:15:19,418 armed with the Spencer repeating rifle 337 00:15:19,418 --> 00:15:21,671 is charged with advancing into the Gap. 338 00:15:21,671 --> 00:15:23,714 Not only do they do that, 339 00:15:23,714 --> 00:15:26,259 but they manage to advance another 2 miles 340 00:15:26,259 --> 00:15:28,344 beyond what they were supposed to. 341 00:15:28,344 --> 00:15:31,889 - One Confederate general estimates Wilder's brigade 342 00:15:31,889 --> 00:15:35,101 to be five times larger than his forces. 343 00:15:35,101 --> 00:15:36,644 When in fact, 344 00:15:36,644 --> 00:15:40,064 Wilder's brigade is actually outnumbered, four to one. 345 00:15:40,064 --> 00:15:41,691 - In the aftermath of the battle, 346 00:15:41,691 --> 00:15:45,194 Wilder's force now becomes known as the Lightning Brigade 347 00:15:45,194 --> 00:15:48,030 because they move like lightning across the battlefield, 348 00:15:48,030 --> 00:15:49,448 and they fight like lions 349 00:15:49,448 --> 00:15:52,368 because they're armed with the Spencer carbine. 350 00:15:52,368 --> 00:15:54,203 - [MJ] After this dramatic demonstration 351 00:15:54,203 --> 00:15:57,540 of the effectiveness and the advantage of the Spencer rifle, 352 00:15:57,540 --> 00:15:59,750 Union officers began demanding these things 353 00:15:59,750 --> 00:16:00,668 for their own units. 354 00:16:00,668 --> 00:16:01,878 - [Dolph] And yet the rifle 355 00:16:01,878 --> 00:16:04,046 still doesn't gain much traction. 356 00:16:04,046 --> 00:16:06,841 Union brass worries it's too expensive, 357 00:16:06,841 --> 00:16:10,469 plus they just ordered thousands more single-shot rifles. 358 00:16:10,469 --> 00:16:14,265 Spencer can't believe it, and hatches a plan. 359 00:16:14,265 --> 00:16:15,766 - [Hakeem] In his frustration, 360 00:16:15,766 --> 00:16:19,020 Spencer decides to just go over all the military's heads 361 00:16:19,020 --> 00:16:22,857 and write directly to their boss, Abraham Lincoln. 362 00:16:22,857 --> 00:16:24,692 - [Martin] The President is a veteran. 363 00:16:24,692 --> 00:16:26,569 The President knows how to handle a firearm, 364 00:16:26,569 --> 00:16:29,113 and Spencer is thinking, "If I can just get the President 365 00:16:29,113 --> 00:16:31,616 to see what my rifle is capable of, 366 00:16:31,616 --> 00:16:33,659 well then the Army will adopt it." 367 00:16:33,659 --> 00:16:36,662 And Lincoln eventually agrees to see Spencer. 368 00:16:36,662 --> 00:16:39,081 [intense music] 369 00:16:39,081 --> 00:16:40,750 - [Don] On August 18, 1863, 370 00:16:40,750 --> 00:16:42,251 carrying one of his repeating rifles 371 00:16:42,251 --> 00:16:43,961 and plenty of ammunition, 372 00:16:43,961 --> 00:16:45,963 Spencer arrives at the White House 373 00:16:45,963 --> 00:16:48,132 and walks straight into the President's office, 374 00:16:48,132 --> 00:16:50,551 and Lincoln likes what he sees. 375 00:16:50,551 --> 00:16:51,844 - [John] The next day, 376 00:16:51,844 --> 00:16:54,388 Spencer takes Lincoln to this cornfield, 377 00:16:54,388 --> 00:16:57,767 which is roughly where the Washington Monument is today, 378 00:16:57,767 --> 00:17:02,688 and they take turns firing his model 1860 rifle 379 00:17:02,688 --> 00:17:05,942 at a marked piece of wood as target practice. 380 00:17:05,942 --> 00:17:07,401 - [Martin] After firing the weapon himself, 381 00:17:07,401 --> 00:17:10,320 the President realizes that this is a unique design, 382 00:17:10,320 --> 00:17:13,616 that this offers a capability to Union fighting forces 383 00:17:13,616 --> 00:17:18,454 that the Confederate military does not have and cannot have. 384 00:17:18,454 --> 00:17:20,539 Lincoln instructs the ordinance department 385 00:17:20,539 --> 00:17:23,459 to move quickly in adoption of this weapon. 386 00:17:23,459 --> 00:17:26,796 - The war department ignores the President's recommendation 387 00:17:26,796 --> 00:17:30,216 because they're concerned that Spencer's repeating rifle 388 00:17:30,216 --> 00:17:34,053 is gonna lead to unprecedented demands on ammunition. 389 00:17:34,053 --> 00:17:37,223 - Less than a year later, after Abraham Lincoln fires 390 00:17:37,223 --> 00:17:39,433 and replaces his head of procurement, 391 00:17:39,433 --> 00:17:42,228 well, the US Navy puts in a large order for those rifles, 392 00:17:42,228 --> 00:17:44,814 and the US Army quickly follows. 393 00:17:44,814 --> 00:17:47,441 - [Dolph] Finally, the Spencer repeating rifle company 394 00:17:47,441 --> 00:17:49,026 ramps up production, 395 00:17:49,026 --> 00:17:52,905 delivering over 100,000 rifles for the US military 396 00:17:52,905 --> 00:17:54,615 over the course of the war. 397 00:17:54,615 --> 00:17:56,450 For mounted cavalry units, 398 00:17:56,450 --> 00:17:59,870 this repeater is a match made in heaven. 399 00:17:59,870 --> 00:18:01,581 - [MJ] With seven rounds ready to go, 400 00:18:01,581 --> 00:18:03,874 this gives cavalry troops a major advantage. 401 00:18:03,874 --> 00:18:07,169 They can ride into battle and not have to stop to reload. 402 00:18:07,169 --> 00:18:09,088 They can keep moving. They can keep firing. 403 00:18:09,088 --> 00:18:11,173 They can keep their enemy on their toes. 404 00:18:12,383 --> 00:18:15,803 - [John] Union Major General James H. Wilson says 405 00:18:15,803 --> 00:18:18,848 there is no doubt that the Spencer rifle 406 00:18:18,848 --> 00:18:21,100 is the most effective firearm 407 00:18:21,100 --> 00:18:24,020 ever placed into the hands of a soldier. 408 00:18:24,020 --> 00:18:26,897 One man armed with this weapon 409 00:18:26,897 --> 00:18:30,568 is as effective as three with any other arm. 410 00:18:30,568 --> 00:18:31,777 - [Don] In a final bit of irony, 411 00:18:31,777 --> 00:18:33,279 assassin John Wilkes Booth 412 00:18:33,279 --> 00:18:35,656 is armed with a Spencer carbine rifle 413 00:18:35,656 --> 00:18:37,491 when he is captured and killed. 414 00:18:37,491 --> 00:18:38,951 The very same weapon 415 00:18:38,951 --> 00:18:42,079 Lincoln himself helped make a wartime standard. 416 00:18:45,333 --> 00:18:46,626 - In the late 1700, 417 00:18:46,626 --> 00:18:48,836 cotton is a problematic crop for farmers 418 00:18:48,836 --> 00:18:50,254 in the American South. 419 00:18:50,254 --> 00:18:52,173 It's so tough to clean, 420 00:18:52,173 --> 00:18:55,134 that turning a profit is challenging. 421 00:18:55,134 --> 00:18:59,388 Then the young inventor comes up with a simple machine 422 00:18:59,388 --> 00:19:03,517 that turns cotton and the country upside down. 423 00:19:03,517 --> 00:19:06,187 His name, Eli Whitney. 424 00:19:07,104 --> 00:19:09,190 [intense music] 425 00:19:09,190 --> 00:19:12,485 - [MJ] It's 1793, and Eli Whitney is a guest 426 00:19:12,485 --> 00:19:14,987 at the Mulberry Grove Plantation in Georgia. 427 00:19:14,987 --> 00:19:16,822 He was traveling south for a tutor job 428 00:19:16,822 --> 00:19:18,407 that unfortunately fell through. 429 00:19:18,407 --> 00:19:21,869 So when his friend invites him to stay at a plantation, 430 00:19:21,869 --> 00:19:22,912 he jumps at the idea. 431 00:19:23,454 --> 00:19:25,247 - [Dolph] Whitney notices right away 432 00:19:25,247 --> 00:19:29,001 that harvesting cotton is brutally hard work. 433 00:19:29,001 --> 00:19:30,795 - He sees enslaved people 434 00:19:30,795 --> 00:19:33,964 working to separate the cotton seeds from the fiber. 435 00:19:33,964 --> 00:19:36,884 It's just incredibly time consuming. 436 00:19:36,884 --> 00:19:38,469 - [MJ] The main cotton grown in the south 437 00:19:38,469 --> 00:19:40,346 is called short staple cotton. 438 00:19:40,346 --> 00:19:41,806 It's really easy to grow, 439 00:19:41,806 --> 00:19:43,933 but it has these really sticky seeds 440 00:19:43,933 --> 00:19:46,394 that are really tough to pull out off the fibers. 441 00:19:46,394 --> 00:19:47,937 You have to do it one by one. 442 00:19:49,063 --> 00:19:50,564 - [Natalia] It could take a worker one full day 443 00:19:50,564 --> 00:19:52,775 to clean 1 pound of cotton. 444 00:19:52,775 --> 00:19:55,403 His friend, whose family owns the plantation, 445 00:19:55,403 --> 00:19:58,239 tells him that this inefficiency is the reason 446 00:19:58,239 --> 00:20:00,991 that cotton will never be a major crop for the south. 447 00:20:00,991 --> 00:20:03,369 It just takes too long to process. 448 00:20:04,954 --> 00:20:06,497 - [Austin] He is walking the grounds, 449 00:20:06,497 --> 00:20:08,207 and then as the story goes, 450 00:20:08,207 --> 00:20:10,835 he sees a cat attacking a chicken. 451 00:20:10,835 --> 00:20:12,253 [chickens clucking] 452 00:20:12,253 --> 00:20:14,714 - [Hakeem] The chicken is in a coop that's fenced in, 453 00:20:14,714 --> 00:20:16,799 so the cat is trying in vain 454 00:20:16,799 --> 00:20:19,593 to get at the chicken through the fence, 455 00:20:19,593 --> 00:20:22,263 but all this cat can get is a few feathers. 456 00:20:22,263 --> 00:20:24,682 The rest of the chicken is staying safe in the coop. 457 00:20:24,682 --> 00:20:27,476 [chickens clucking] [intense music] 458 00:20:27,476 --> 00:20:28,936 - [Dolph] For an inventor, 459 00:20:28,936 --> 00:20:32,022 moments like this can lead to big things. 460 00:20:32,022 --> 00:20:34,108 - [Hakeem] As Whitney watches the cat 461 00:20:34,108 --> 00:20:35,484 pulling feathers out of the coop, 462 00:20:35,484 --> 00:20:37,027 he thinks to himself, 463 00:20:37,027 --> 00:20:40,072 "What if a machine could do the same thing for cotton?" 464 00:20:40,072 --> 00:20:43,242 [intense music] 465 00:20:43,242 --> 00:20:45,953 - [Dolph] Whitney's machine is the cotton gin, 466 00:20:45,953 --> 00:20:47,413 and he keeps the design simple 467 00:20:47,413 --> 00:20:50,166 so it's easy to operate and mass produce. 468 00:20:51,500 --> 00:20:54,503 - [Hakeem] He designs a system of rotating wire teeth 469 00:20:54,503 --> 00:20:56,922 that can pull cotton through a mesh. 470 00:20:56,922 --> 00:21:00,676 The seeds can't pass through, so they're left behind. 471 00:21:00,676 --> 00:21:02,136 - [Austin] After the seeds are separated, 472 00:21:02,136 --> 00:21:05,347 a cleaning brush separates the fiber from the mesh. 473 00:21:06,432 --> 00:21:09,268 - [Dolph] The machine itself is just a small wooden box 474 00:21:09,268 --> 00:21:11,228 about the size of a footlocker. 475 00:21:11,228 --> 00:21:13,647 Whitney wants the gins to be compact 476 00:21:13,647 --> 00:21:16,317 so you can easily get them to customers. 477 00:21:16,317 --> 00:21:18,360 - [Hakeem] After perfecting this prototype, 478 00:21:18,360 --> 00:21:21,697 Eli Whitney forms a partnership with Phineas Miller, 479 00:21:21,697 --> 00:21:25,618 and together, they patent the world's first cotton gin. 480 00:21:27,161 --> 00:21:29,538 - [Natalia] Instead of selling the cotton gins outright, 481 00:21:29,538 --> 00:21:31,457 Whitney and Miller decide that what they'll do 482 00:21:31,457 --> 00:21:34,460 is install them and then charge a processing fee. 483 00:21:34,460 --> 00:21:37,671 So Whitney and Miller are the ones who own the machines. 484 00:21:37,671 --> 00:21:40,591 - [Dolph] It sounds great, but there's one big problem. 485 00:21:41,509 --> 00:21:43,511 - [Austin] Farmers don't wanna pay 486 00:21:43,511 --> 00:21:45,596 to subscribe to someone else's machine. 487 00:21:45,596 --> 00:21:47,515 They wanna own the device themselves. 488 00:21:48,849 --> 00:21:51,602 - [Dolph] Whitney and Miller's business is a bust, 489 00:21:51,602 --> 00:21:53,312 but as imitators flood the market 490 00:21:53,312 --> 00:21:54,939 with their own cotton gins, 491 00:21:54,939 --> 00:21:57,233 cotton production explodes. 492 00:21:58,275 --> 00:22:00,152 - [Hakeem] It's impossible to overstate 493 00:22:00,152 --> 00:22:03,155 how much cotton production soars. 494 00:22:03,155 --> 00:22:06,367 The agricultural landscape of America's deep south 495 00:22:06,367 --> 00:22:08,577 is transformed, 496 00:22:08,577 --> 00:22:12,498 and it positions cotton as a dominant export of America. 497 00:22:12,498 --> 00:22:14,124 - [Austin] Before the cotton gin, 498 00:22:14,124 --> 00:22:16,877 the country produces around 3,000 bales of cotton per year. 499 00:22:16,877 --> 00:22:20,589 By 1860, it produces over 4 million. 500 00:22:21,340 --> 00:22:22,967 - [Dolph] And all this success, 501 00:22:22,967 --> 00:22:25,636 it comes with a horrible consequence. 502 00:22:25,636 --> 00:22:28,097 - Usually, when an industry is mechanized in this way, 503 00:22:28,097 --> 00:22:30,474 you see a reduction in need for manpower. 504 00:22:30,474 --> 00:22:32,852 With the cotton gin, the reverse happens. 505 00:22:32,852 --> 00:22:36,230 - As more land is clear to make way for growing cotton, 506 00:22:36,230 --> 00:22:38,649 more manpower is needed to plant it, 507 00:22:38,649 --> 00:22:40,526 maintain it, and pick it. 508 00:22:40,526 --> 00:22:42,361 - [Natalia] The crop becomes so profitable 509 00:22:42,361 --> 00:22:44,738 that it just drives up demand for cotton. 510 00:22:44,738 --> 00:22:48,409 This in turn, expands the institution of slavery. 511 00:22:48,409 --> 00:22:51,078 So the cotton industry and the abolitionists 512 00:22:51,078 --> 00:22:52,830 are now at odds with one another. 513 00:22:52,830 --> 00:22:56,166 - [Hakeem] In a way, Eli Whitney could have never predicted 514 00:22:56,166 --> 00:22:59,086 that his simple invention would have this butterfly effect 515 00:22:59,086 --> 00:23:03,048 that would lead to the increase in American slavery, 516 00:23:03,048 --> 00:23:05,676 and ultimately, to America's Civil War. 517 00:23:09,013 --> 00:23:11,140 - In the early 1940s, 518 00:23:11,140 --> 00:23:13,267 as Hitler tightens his grip on Europe in World War II, 519 00:23:13,267 --> 00:23:15,185 one question looms over the fighting, 520 00:23:15,185 --> 00:23:19,398 "How do you feed millions in a world decimated by conflict?" 521 00:23:19,398 --> 00:23:22,902 [plane engines revving] 522 00:23:22,902 --> 00:23:26,363 - By the end of 1941, the Nazi Empire is at its apex. 523 00:23:26,363 --> 00:23:28,407 It has troops at the gates of Moscow. 524 00:23:28,407 --> 00:23:31,535 It has troops up at northern Norway near the Arctic Circle. 525 00:23:31,535 --> 00:23:34,663 It has troops in the desert in North Africa, 526 00:23:34,663 --> 00:23:37,249 and of course, all along Hitler's Atlantic wall 527 00:23:37,249 --> 00:23:39,168 in France, Belgium, and Holland. 528 00:23:39,168 --> 00:23:42,379 So this is Germany at its most powerful. 529 00:23:42,379 --> 00:23:45,966 It controls all the food sources in this area. 530 00:23:47,051 --> 00:23:48,928 - [Martin] This means that agriculturally productive 531 00:23:48,928 --> 00:23:50,888 areas of Europe that had once functioned 532 00:23:50,888 --> 00:23:52,222 as Europe's breadbasket, 533 00:23:52,222 --> 00:23:55,476 are now under Adolf Hitler's direct control. 534 00:23:55,476 --> 00:23:56,727 - [John] During World War II, 535 00:23:56,727 --> 00:23:58,562 people in much of the world are starving 536 00:23:58,562 --> 00:24:01,148 in cities under siege like Leningrad. 537 00:24:01,148 --> 00:24:04,318 And even in unoccupied countries like the United Kingdom, 538 00:24:04,318 --> 00:24:06,403 there's heavy rationing going on. 539 00:24:06,403 --> 00:24:08,197 - [Martin] This produces two crises. 540 00:24:08,197 --> 00:24:09,698 One, is a civilian crisis 541 00:24:09,698 --> 00:24:11,617 where you have to feed all of the civilians 542 00:24:11,617 --> 00:24:12,868 who are under occupation. 543 00:24:12,868 --> 00:24:15,204 And then the second part is, a military crisis, 544 00:24:15,204 --> 00:24:16,664 where you have to feed 545 00:24:16,664 --> 00:24:18,624 all of the millions of women and men in uniform. 546 00:24:19,500 --> 00:24:22,461 - By the time we get to the end of 1941 and into '42, 547 00:24:22,461 --> 00:24:24,797 the United States of America is now into the war, 548 00:24:24,797 --> 00:24:27,299 and this is a huge game changer 549 00:24:27,299 --> 00:24:31,011 because the United States is not under direct threat. 550 00:24:31,011 --> 00:24:33,847 And as such, American farmers have the luxury 551 00:24:33,847 --> 00:24:37,434 of still being able to grow their crops, particularly wheat. 552 00:24:38,811 --> 00:24:41,563 - [Dolph] But it's not as easy as just growing more food. 553 00:24:41,563 --> 00:24:44,191 You need the manpower to harvest it. 554 00:24:44,191 --> 00:24:47,569 - Harvesting wheat has always been a logistical nightmare. 555 00:24:47,569 --> 00:24:50,364 I mean, you could have equipment that you pull along, 556 00:24:50,364 --> 00:24:52,449 but the really fine detailed stuff 557 00:24:52,449 --> 00:24:54,576 like separating the wheat from the chaff, 558 00:24:54,576 --> 00:24:56,954 that has to be done by hand. 559 00:24:56,954 --> 00:25:00,457 It takes days, even weeks, to clear a single field. 560 00:25:00,457 --> 00:25:01,583 - [Martin] Timing is critical when it 561 00:25:01,583 --> 00:25:03,335 comes to harvesting wheat. 562 00:25:03,335 --> 00:25:05,421 There is only a brief window of time 563 00:25:05,421 --> 00:25:07,631 during which wheat can be harvested, 564 00:25:07,631 --> 00:25:09,967 after which, it is no longer useful 565 00:25:09,967 --> 00:25:11,969 to even go through the effort of harvesting it. 566 00:25:11,969 --> 00:25:14,847 - On top of everything else, because of the war, 567 00:25:14,847 --> 00:25:17,433 a lot of the men are off fighting somewhere 568 00:25:17,433 --> 00:25:19,393 or they're working in a factory, 569 00:25:19,393 --> 00:25:22,563 so there's a serious lack of manpower. 570 00:25:22,563 --> 00:25:23,772 - [Dolph] What the Allies need 571 00:25:23,772 --> 00:25:27,860 is a machine called the Combine Harvester. 572 00:25:27,860 --> 00:25:29,528 - It's not just a clever name. 573 00:25:29,528 --> 00:25:34,283 It combines multiple processes that were once done by hand. 574 00:25:34,283 --> 00:25:37,911 - Combines cut the wheat, they separate it, they store it, 575 00:25:37,911 --> 00:25:41,915 and get rid of the waste, all in one operation. 576 00:25:41,915 --> 00:25:44,543 - [John] Combine harvesters are not a new idea. 577 00:25:44,543 --> 00:25:46,420 The first combine harvester 578 00:25:46,420 --> 00:25:50,716 was built by an engineer named Hiram Moore in 1835. 579 00:25:50,716 --> 00:25:54,136 The problem is, these things are absolutely huge. 580 00:25:54,136 --> 00:25:57,639 They take teams of like 20 horses or tractors to pull, 581 00:25:57,639 --> 00:25:58,932 and they have to be accompanied 582 00:25:58,932 --> 00:26:01,018 by whole teams of farm workers. 583 00:26:01,018 --> 00:26:04,521 [intense music] 584 00:26:04,521 --> 00:26:06,231 - [Dolph] Then in 1941, 585 00:26:06,231 --> 00:26:08,942 a Canadian company, Massey-Harris, 586 00:26:08,942 --> 00:26:12,821 comes up with a radical idea, "Who needs horses or men?" 587 00:26:12,821 --> 00:26:17,117 They introduce an entirely new version of a harvester. 588 00:26:19,328 --> 00:26:21,455 It's called the Model 21. 589 00:26:21,455 --> 00:26:25,793 It cut, separates, and store's wheat like previous combines. 590 00:26:25,793 --> 00:26:28,754 The difference, this one is self-propelled 591 00:26:28,754 --> 00:26:31,006 and needs only one driver. 592 00:26:31,006 --> 00:26:34,593 - The number 21 is not towed by horses. 593 00:26:34,593 --> 00:26:36,720 It's not towed by a tractor. 594 00:26:36,720 --> 00:26:40,974 It is tractor and harvester all in one. 595 00:26:40,974 --> 00:26:44,228 It's its own beast, and it's fast. 596 00:26:44,228 --> 00:26:46,563 - [Martin] Model 21 is so efficient 597 00:26:46,563 --> 00:26:48,774 that with one pass across a field 598 00:26:48,774 --> 00:26:50,984 that's ripe and ready for cultivation, 599 00:26:50,984 --> 00:26:52,778 it can bring in the entire harvest. 600 00:26:53,779 --> 00:26:55,155 - [Dolph] Under the hood, 601 00:26:55,155 --> 00:26:58,283 the 21 packs a six cylinder industrial engine 602 00:26:58,283 --> 00:27:00,953 that pumps out up to 60 horsepower. 603 00:27:00,953 --> 00:27:03,872 Those old combines that needed 20 horses, 604 00:27:03,872 --> 00:27:05,749 this engine triples that. 605 00:27:05,749 --> 00:27:09,837 - [David] It can do eight acres in just an hour. 606 00:27:09,837 --> 00:27:13,090 Three times what human beings can do. 607 00:27:13,090 --> 00:27:15,551 This is a revolutionary game changer. 608 00:27:16,718 --> 00:27:18,011 - [Dolph] But there's one problem. 609 00:27:18,011 --> 00:27:20,264 There are wartime restrictions on steel use. 610 00:27:20,264 --> 00:27:22,641 How are they gonna build a fleet to combines 611 00:27:22,641 --> 00:27:25,477 when most of the steels being used to build tanks, 612 00:27:25,477 --> 00:27:27,187 planes, and ships? 613 00:27:27,187 --> 00:27:31,149 - Joe Tucker, sales manager for Massey-Harris USA 614 00:27:31,149 --> 00:27:33,402 has a bold idea. 615 00:27:33,402 --> 00:27:36,363 He has the audacity to go to the war department 616 00:27:36,363 --> 00:27:39,992 and ask them for a release of steel 617 00:27:39,992 --> 00:27:41,869 in order to finance the building 618 00:27:41,869 --> 00:27:45,205 of 500 new combine harvesters. 619 00:27:45,205 --> 00:27:46,415 - [John] He sells them hard. 620 00:27:46,415 --> 00:27:49,042 Tucker tells the war production board 621 00:27:49,042 --> 00:27:51,879 that the Massey-Harris Model number 21 622 00:27:51,879 --> 00:27:55,340 is capable of harvesting more wheat than any other machine 623 00:27:55,340 --> 00:27:57,551 and with less fuel and less manpower. 624 00:27:57,551 --> 00:27:59,011 - [David] So the war production board, 625 00:27:59,011 --> 00:28:00,512 they have a decision to make. 626 00:28:00,512 --> 00:28:02,931 What he's asking, it's gonna require a lot of steel, 627 00:28:02,931 --> 00:28:06,018 but they realize that their armies move on their stomachs 628 00:28:06,018 --> 00:28:07,978 and they need food. 629 00:28:07,978 --> 00:28:09,479 And as a result, 630 00:28:09,479 --> 00:28:12,316 they agree to going with the Massey-Harvester 21. 631 00:28:14,276 --> 00:28:17,279 - [Dolph] Farmers get to buy the 21 for a discount 632 00:28:17,279 --> 00:28:18,780 with one condition. 633 00:28:18,780 --> 00:28:21,491 They have to bring in 2,000 acres of grain 634 00:28:21,491 --> 00:28:23,076 for the war effort. 635 00:28:23,076 --> 00:28:24,953 - [Martin] Tucker calls it the Harvest Brigade. 636 00:28:24,953 --> 00:28:27,080 This fleet of self-contained harvesters 637 00:28:27,080 --> 00:28:28,540 go out across the country 638 00:28:28,540 --> 00:28:31,668 following the harvest like a military mission. 639 00:28:31,668 --> 00:28:34,463 - They send scouts out by car, by airplane, 640 00:28:34,463 --> 00:28:37,174 to find wheat fields just as they're about to ripen, 641 00:28:37,174 --> 00:28:38,842 and then they go out and harvest it. 642 00:28:38,842 --> 00:28:40,928 - [David] The combines are deployed everywhere, 643 00:28:40,928 --> 00:28:43,597 like an army onto a battlefield. 644 00:28:43,597 --> 00:28:45,557 These machines start invading 645 00:28:45,557 --> 00:28:47,059 almost every single wheat field 646 00:28:47,059 --> 00:28:49,186 between the Dakotas and Texas. 647 00:28:49,186 --> 00:28:52,272 And while you have the shooting war going on in Europe, 648 00:28:52,272 --> 00:28:54,566 you got the grain war going on in America. 649 00:28:54,566 --> 00:28:56,443 - [Austin] By the time the harvest is done, 650 00:28:56,443 --> 00:29:01,281 the brigade brings in over 1 million acres of grain. 651 00:29:01,281 --> 00:29:04,993 That's 25 million bushels of wheat and other grains 652 00:29:04,993 --> 00:29:08,205 that weren't available before to feed soldiers, 653 00:29:08,205 --> 00:29:10,749 to feed the starving of Europe. 654 00:29:10,749 --> 00:29:13,001 It is a massive success. 655 00:29:14,962 --> 00:29:17,255 - [Dolph] The war production board is so impressed, 656 00:29:17,255 --> 00:29:20,550 it orders 750 more harvesters. 657 00:29:20,550 --> 00:29:23,053 They stay in circulation for decades, 658 00:29:23,053 --> 00:29:26,848 changing farming and cementing the machine's legacy. 659 00:29:26,848 --> 00:29:28,767 - [David] When you think about World War II, 660 00:29:28,767 --> 00:29:31,603 you think about all these incredible sexy machines 661 00:29:31,603 --> 00:29:32,938 that win the war. 662 00:29:32,938 --> 00:29:36,441 The Sherman Tank, the P-51. 663 00:29:36,441 --> 00:29:37,985 So at the end of the war, 664 00:29:37,985 --> 00:29:39,403 who would've believed 665 00:29:39,403 --> 00:29:43,115 that one of the most decisive of all machines, 666 00:29:43,115 --> 00:29:44,616 is the Massey-Harris 21. 667 00:29:47,536 --> 00:29:49,162 - For many machines, 668 00:29:49,162 --> 00:29:50,664 progress means making things more complicated, 669 00:29:50,664 --> 00:29:52,874 and a whole lot more expensive. 670 00:29:52,874 --> 00:29:57,170 But in 1908, Henry Ford turns that idea on its head. 671 00:29:57,170 --> 00:30:01,633 He decides to build a car that's simple and cheap. 672 00:30:01,633 --> 00:30:04,803 His gamble does more than reinvent autos, 673 00:30:04,803 --> 00:30:06,847 it builds a new way of life. 674 00:30:10,350 --> 00:30:11,935 - [Lance] At the beginning of the 20th century, 675 00:30:11,935 --> 00:30:14,730 getting around America is still a challenge. 676 00:30:14,730 --> 00:30:16,231 If you wanna get around locally, 677 00:30:16,231 --> 00:30:18,525 you're still talking about horses and carriages. 678 00:30:18,525 --> 00:30:20,610 If you live in a city, there might be a trolley 679 00:30:20,610 --> 00:30:23,530 that's only useful for getting around town. 680 00:30:23,530 --> 00:30:25,157 - [Hakeem] There are automobiles, 681 00:30:25,157 --> 00:30:27,325 but really, it's the wealthy that own them. 682 00:30:28,243 --> 00:30:31,371 By 1908, only 1% of households 683 00:30:31,371 --> 00:30:33,665 own or have access to an automobile. 684 00:30:33,665 --> 00:30:37,878 So automobile owners are literally the 1%. 685 00:30:37,878 --> 00:30:39,838 - Because cars are so expensive 686 00:30:39,838 --> 00:30:41,882 and so few people can afford them, 687 00:30:41,882 --> 00:30:43,800 the ability to own a car, 688 00:30:43,800 --> 00:30:46,178 it's like telling people you own a spaceship. 689 00:30:46,178 --> 00:30:49,639 You are next-level wealthy if you have one of these. 690 00:30:49,639 --> 00:30:52,809 So the manufacturers just start making nicer and nicer cars. 691 00:30:52,809 --> 00:30:55,395 So they just figure we'll just make it more expensive, 692 00:30:55,395 --> 00:30:58,273 we'll make less of them, and we'll make more money. 693 00:30:58,273 --> 00:31:00,484 - Models like the Cadillac Model G, 694 00:31:00,484 --> 00:31:02,235 the Packard Model 30, 695 00:31:02,235 --> 00:31:05,947 have luxury features like hand-tufted seats, 696 00:31:05,947 --> 00:31:08,283 woodgrain interiors, electric starters, 697 00:31:08,283 --> 00:31:10,118 and custom paint jobs. 698 00:31:10,118 --> 00:31:11,870 - [Lance] These cars almost had the opulence 699 00:31:11,870 --> 00:31:14,456 of a Gilded-Aged parlor room, 700 00:31:14,456 --> 00:31:15,874 and they were status symbols 701 00:31:15,874 --> 00:31:18,835 that might cost up to 4 to $5,000 a piece. 702 00:31:18,835 --> 00:31:21,880 That's up to 10 years salary for an average worker. 703 00:31:21,880 --> 00:31:23,840 - [Dolph] One man thinks differently. 704 00:31:23,840 --> 00:31:24,800 When he looks at a car, 705 00:31:24,800 --> 00:31:27,177 he doesn't see a luxury machine, 706 00:31:27,177 --> 00:31:30,430 he sees the opportunity for a revolution. 707 00:31:30,430 --> 00:31:33,475 That man of course, is Henry Ford. 708 00:31:34,684 --> 00:31:36,645 - [Lance] Car manufacturing is a risky business. 709 00:31:36,645 --> 00:31:40,649 By 1908, Henry Ford has already gone out of business twice. 710 00:31:40,649 --> 00:31:42,859 Ford's first company fails in 1901, 711 00:31:42,859 --> 00:31:46,071 really because he's more an engineer than a businessman. 712 00:31:46,071 --> 00:31:47,239 - [Hakeem] His second company, 713 00:31:47,239 --> 00:31:50,408 the Henry Ford Company, crumbles in 1902, 714 00:31:50,408 --> 00:31:52,494 when he battles with his investors 715 00:31:52,494 --> 00:31:54,371 over the company direction. 716 00:31:54,371 --> 00:31:57,082 He wants to focus on affordability, 717 00:31:57,082 --> 00:31:59,042 but they want luxury. 718 00:31:59,042 --> 00:32:00,669 - When Ford leaves, 719 00:32:00,669 --> 00:32:03,922 his former partners decide to rename the company, Cadillac. 720 00:32:03,922 --> 00:32:06,091 [intense music] 721 00:32:06,091 --> 00:32:07,300 - [Dolph] For Henry Ford, 722 00:32:07,300 --> 00:32:09,010 there would be no sweeter revenge 723 00:32:09,010 --> 00:32:12,472 than building the ultimate affordable car for the masses, 724 00:32:12,472 --> 00:32:15,642 and dominating the entire car industry with it. 725 00:32:17,144 --> 00:32:21,523 - [Lance] By 1908, Ford makes his big swing with the Model T. 726 00:32:21,523 --> 00:32:24,776 [intense music] 727 00:32:24,776 --> 00:32:27,737 Ford designs the Model T for practicality first. 728 00:32:27,737 --> 00:32:30,490 That's his no Packard or Cadillac. 729 00:32:30,490 --> 00:32:32,075 It uses a crank start 730 00:32:32,075 --> 00:32:34,536 to save on the cost of the electric starter. 731 00:32:34,536 --> 00:32:37,330 - The Model T is simple. It's just utilitarian. 732 00:32:37,330 --> 00:32:39,791 Basic seating, it's got a 20 horsepower, 733 00:32:39,791 --> 00:32:41,001 four-cylinder engine, 734 00:32:41,001 --> 00:32:42,169 and it runs on gasoline, 735 00:32:42,169 --> 00:32:43,795 which is widely available at the time. 736 00:32:43,795 --> 00:32:48,425 - Fewer than 10% of roads are paved in America in 1908. 737 00:32:48,425 --> 00:32:51,094 So Ford designs the Model T 738 00:32:51,094 --> 00:32:53,180 to have sufficient ground clearance 739 00:32:53,180 --> 00:32:55,765 as well as reliable suspension 740 00:32:55,765 --> 00:32:58,351 that can handle all of the bumps and potholes 741 00:32:58,351 --> 00:32:59,936 of the roads of that time. 742 00:33:01,271 --> 00:33:02,689 - [Rutledge] In a world of luxury cars 743 00:33:02,689 --> 00:33:05,525 that you really need to be a specialist to work on, 744 00:33:05,525 --> 00:33:07,986 the Model T is designed to be simple, 745 00:33:07,986 --> 00:33:09,404 that anyone could work on it. 746 00:33:09,404 --> 00:33:11,406 If you can operate your tractor at home, 747 00:33:11,406 --> 00:33:14,451 you can take the cylinder head off of this car 748 00:33:14,451 --> 00:33:16,036 to get out the carbon deposits 749 00:33:16,036 --> 00:33:17,996 that build up pretty easily on there. 750 00:33:17,996 --> 00:33:19,497 - With all his cost-cutting features, 751 00:33:19,497 --> 00:33:21,833 Ford is able to introduce his two-seater Model T 752 00:33:21,833 --> 00:33:24,628 for just $825. 753 00:33:24,628 --> 00:33:27,339 It's aggressive, and he sells 10,000 of them. 754 00:33:27,339 --> 00:33:30,091 But he realized it has to be even cheaper 755 00:33:30,091 --> 00:33:31,968 if he wants to start his revolution. 756 00:33:34,554 --> 00:33:35,472 - [Dolph] To reach his goal, 757 00:33:35,472 --> 00:33:37,724 Ford focuses on efficiency, 758 00:33:37,724 --> 00:33:40,852 and unveils arguably his biggest innovation, 759 00:33:40,852 --> 00:33:42,979 the moving assembly line. 760 00:33:44,272 --> 00:33:47,108 - This means that now, the workers can stay put 761 00:33:47,108 --> 00:33:49,527 and do the one job they've been trained in 762 00:33:49,527 --> 00:33:52,656 over and over again as the cars move past them. 763 00:33:52,656 --> 00:33:55,283 This results in an increase in efficiency 764 00:33:55,283 --> 00:33:58,203 and a massive drop in accidents. 765 00:33:58,203 --> 00:33:59,704 - [Kavitha] Custom features drive up 766 00:33:59,704 --> 00:34:01,498 the cost of manufacturing, 767 00:34:01,498 --> 00:34:04,668 so Ford aims to keep the parts as standardized 768 00:34:04,668 --> 00:34:06,336 and interchangeable as possible. 769 00:34:06,336 --> 00:34:10,005 - Ford realizes that black paint dries faster, 770 00:34:10,005 --> 00:34:12,801 and it takes fewer coats and less buffing. 771 00:34:12,801 --> 00:34:14,427 So he announces 772 00:34:14,427 --> 00:34:19,014 that his customers can have any color car they want 773 00:34:19,014 --> 00:34:20,558 as long as it's black. 774 00:34:21,476 --> 00:34:23,520 - [Lance] By 1914, the Model T goes 775 00:34:23,520 --> 00:34:28,065 from taking 12-and-a-half hours to make, to just 93 minutes, 776 00:34:28,065 --> 00:34:30,485 all by using less manpower. 777 00:34:30,485 --> 00:34:32,654 - [Rutledge] The result of all of this efficiency, 778 00:34:32,654 --> 00:34:34,947 is that Ford continues to drop the price 779 00:34:34,947 --> 00:34:37,284 on the Model T as time goes on. 780 00:34:37,284 --> 00:34:40,411 - [Dolph] The Model T drops to $550. 781 00:34:40,411 --> 00:34:43,748 And by the time Ford makes his ten millionth car, 782 00:34:43,748 --> 00:34:46,293 half the cars in the world are Fords, 783 00:34:46,293 --> 00:34:48,085 and they're still getting cheaper. 784 00:34:49,295 --> 00:34:52,465 - [Rutledge] By 1925, the price of the Model T had come down 785 00:34:52,465 --> 00:34:56,177 to just $260 for a car. 786 00:34:56,177 --> 00:34:57,596 This is amazing, right? 787 00:34:57,596 --> 00:34:59,514 It also means that every single person 788 00:34:59,514 --> 00:35:02,058 that's working on the line to build the Model T 789 00:35:02,058 --> 00:35:03,768 can also afford one. 790 00:35:03,768 --> 00:35:05,645 This is a game changer. 791 00:35:06,396 --> 00:35:09,858 - [Dolph] Over 15 million model T's are built and sold 792 00:35:09,858 --> 00:35:12,611 during its 19-year production run. 793 00:35:12,611 --> 00:35:15,196 - In the end, Henry Ford did get his revolution. 794 00:35:15,196 --> 00:35:17,324 Not just because he dominated the competition, 795 00:35:17,324 --> 00:35:19,951 but because in making cars so accessible, 796 00:35:19,951 --> 00:35:23,038 he took what was once a luxury, and made it a necessity. 797 00:35:27,083 --> 00:35:28,877 - By the early 1970s, 798 00:35:28,877 --> 00:35:31,796 machines carry Americans to the moon 799 00:35:31,796 --> 00:35:33,298 and to victory in the space race. 800 00:35:33,298 --> 00:35:35,008 So NASA turns to a new goal. 801 00:35:35,008 --> 00:35:37,093 What if their engineers could build a machine 802 00:35:37,093 --> 00:35:41,514 that lets us not just visit space, but actually live there? 803 00:35:42,515 --> 00:35:45,185 [intense music] 804 00:35:45,185 --> 00:35:46,603 - [Lance] It's March of 1973, 805 00:35:46,603 --> 00:35:48,688 and America watches as NASA counts down 806 00:35:48,688 --> 00:35:51,441 the launch of its first space laboratory. 807 00:35:51,441 --> 00:35:53,068 It's called Skylab. 808 00:35:53,193 --> 00:35:56,488 - If NASA wants to look way forward to longer moon missions 809 00:35:56,488 --> 00:35:59,199 and to missions to other planets like Mars, 810 00:35:59,199 --> 00:36:02,911 it needs to understand the long-term health effects 811 00:36:02,911 --> 00:36:05,246 of space travel on the human body. 812 00:36:08,083 --> 00:36:10,335 - [Dolph] A towering Saturn V rocket, 813 00:36:10,335 --> 00:36:12,712 the same one that put man on the moon, 814 00:36:12,712 --> 00:36:15,548 launched a Skylab into orbit. 815 00:36:15,548 --> 00:36:18,176 - [Natalia] Minutes after takeoff, Skylab is crippled. 816 00:36:18,176 --> 00:36:20,595 Its shield and panels are torn off, 817 00:36:20,595 --> 00:36:22,430 causing the station to overheat. 818 00:36:23,890 --> 00:36:26,893 - [Dolph] The crew recovers and keeps Skylab in orbit, 819 00:36:26,893 --> 00:36:29,813 but the problems persist, and six years later, 820 00:36:29,813 --> 00:36:31,481 it crashes back to Earth. 821 00:36:34,150 --> 00:36:37,278 [intense music] [crowd cheering] 822 00:36:37,278 --> 00:36:40,073 In 1993, president Bill Clinton 823 00:36:40,073 --> 00:36:42,867 sees an opportunity to take the baton. 824 00:36:42,867 --> 00:36:46,871 The US teams with other countries, including Russia, 825 00:36:46,871 --> 00:36:48,331 for a new project, 826 00:36:48,331 --> 00:36:50,500 the International Space Station. 827 00:36:50,500 --> 00:36:53,920 [intense music] 828 00:36:53,920 --> 00:36:55,630 - [Lance] In November of 1998, 829 00:36:55,630 --> 00:36:57,507 the first module, Russia's Zarya, 830 00:36:57,507 --> 00:36:58,842 launches successfully, 831 00:36:58,842 --> 00:37:01,052 [person speaking indistinctly] 832 00:37:01,052 --> 00:37:03,638 followed a few weeks later by America's Unity module, 833 00:37:03,638 --> 00:37:05,056 delivered by the Space Shuttle. 834 00:37:05,056 --> 00:37:07,642 - [Dr. Sutter] The ISS will be built modularly 835 00:37:07,642 --> 00:37:08,601 in low Earth orbit, 836 00:37:08,601 --> 00:37:11,438 like the world's greatest Lego set. 837 00:37:12,522 --> 00:37:14,816 Astronaut Ross, and colleague, Jim Newman, 838 00:37:14,816 --> 00:37:16,735 performed the painstaking task 839 00:37:16,735 --> 00:37:19,446 of connecting the Unity and Zarya modules 840 00:37:19,446 --> 00:37:24,200 over three grueling spacewalks, totaling 21 hours. 841 00:37:24,200 --> 00:37:27,412 [upbeat music] 842 00:37:27,412 --> 00:37:28,872 - [Dolph] It takes over 30 missions 843 00:37:28,872 --> 00:37:32,834 and a decade of space walks to finish the ISS. 844 00:37:32,834 --> 00:37:36,129 It is substantially complete by July 2011. 845 00:37:37,839 --> 00:37:39,966 - [Nehemiah] Today, the International Space Station 846 00:37:39,966 --> 00:37:42,886 looks like an enormous metallic dragonfly, 847 00:37:42,886 --> 00:37:46,931 and its solar arrays stretch 240 feet across. 848 00:37:46,931 --> 00:37:50,310 - [Don] When you first see images of the ISS, 849 00:37:50,310 --> 00:37:51,561 it doesn't look real. 850 00:37:51,561 --> 00:37:53,313 I mean, it looks like it's out of a movie. 851 00:37:53,313 --> 00:37:56,191 As reality sets in, you begin to realize 852 00:37:56,191 --> 00:37:58,401 people are living in that thing 853 00:37:58,401 --> 00:37:59,819 all the time. 854 00:37:59,819 --> 00:38:01,029 - [Dolph] The station itself 855 00:38:01,029 --> 00:38:04,532 is roughly 357 feet end to end, 856 00:38:04,532 --> 00:38:07,118 about the length of a US football field, 857 00:38:07,118 --> 00:38:10,288 and weighs nearly 420 tons. 858 00:38:10,288 --> 00:38:11,664 This is the largest structure 859 00:38:11,664 --> 00:38:15,210 humans have ever assembled in space. 860 00:38:15,210 --> 00:38:18,922 - [Dr. Sutter] The ISS looks like a modular spy. 861 00:38:18,922 --> 00:38:20,840 It's this central long truss 862 00:38:20,840 --> 00:38:23,885 that supports these vast solar arrays 863 00:38:23,885 --> 00:38:26,054 that converts sunlight into electricity 864 00:38:26,054 --> 00:38:28,056 for powering the station. 865 00:38:28,056 --> 00:38:30,266 - [Lance] They rotate like sunflower petals 866 00:38:30,266 --> 00:38:33,311 towards the sun, and there are backup batteries 867 00:38:33,311 --> 00:38:35,104 for the time when the station is in the Earth's shadow, 868 00:38:35,104 --> 00:38:36,648 which blocks out solar power. 869 00:38:37,774 --> 00:38:39,400 - [Dolph] Branching off the main section 870 00:38:39,400 --> 00:38:40,944 are pressurized modules, 871 00:38:40,944 --> 00:38:43,988 thus serve as living spaces, science labs, 872 00:38:43,988 --> 00:38:45,365 and control areas. 873 00:38:45,365 --> 00:38:48,618 The ISS orbits Earth so fast 874 00:38:48,618 --> 00:38:53,122 astronauts see a new sunrise every 90 minutes. 875 00:38:53,122 --> 00:38:54,541 - [Natalia] One major challenge 876 00:38:54,666 --> 00:38:57,168 is keeping this massive space station in orbit, 877 00:38:57,168 --> 00:39:00,547 and not having it suffer the same fate as Skylab. 878 00:39:00,547 --> 00:39:03,258 - [Don] The station exists in a continuous state of free fall. 879 00:39:03,258 --> 00:39:04,676 So every so often, 880 00:39:04,676 --> 00:39:06,970 a thruster has to kick in to maintain altitude. 881 00:39:06,970 --> 00:39:09,389 Otherwise, it's gonna fall straight back to Earth. 882 00:39:09,389 --> 00:39:11,808 - This free fall creates a near weightless environment. 883 00:39:11,808 --> 00:39:13,560 Everything inside the ISS, 884 00:39:13,560 --> 00:39:16,145 astronauts, tools, droplets of water, 885 00:39:16,145 --> 00:39:17,897 are affected by microgravity, 886 00:39:17,897 --> 00:39:20,191 and that's why you can see astronauts floating so easily 887 00:39:20,191 --> 00:39:22,151 from compartment to compartment. 888 00:39:22,151 --> 00:39:25,613 - [Dolph] But that lack of gravity causes issues. 889 00:39:25,613 --> 00:39:27,448 - [Nehemiah] Tests show that astronauts 890 00:39:27,448 --> 00:39:30,702 lose up to 20% of their muscle mass 891 00:39:30,702 --> 00:39:32,912 after being in space for just weeks. 892 00:39:32,912 --> 00:39:35,707 - [Dr. Sutter] They've come up with diet and vitamin regimens, 893 00:39:35,707 --> 00:39:37,834 but the most critical component 894 00:39:37,834 --> 00:39:40,670 is two hours of exercise a day 895 00:39:40,670 --> 00:39:43,131 done with resistance training. 896 00:39:43,131 --> 00:39:45,508 And since they're in zero gravity, 897 00:39:45,508 --> 00:39:47,093 they're working out with the equivalent 898 00:39:47,093 --> 00:39:50,179 of 600 pounds of weight. 899 00:39:50,179 --> 00:39:53,141 But they don't know if this protocol will be enough 900 00:39:53,141 --> 00:39:54,517 to solve the problem. 901 00:39:56,728 --> 00:39:57,979 - [Dolph] In 2015, 902 00:39:57,979 --> 00:40:00,481 NASA launches its most ambitious study 903 00:40:00,481 --> 00:40:02,692 of a long-term space flight, 904 00:40:02,692 --> 00:40:05,570 using identical twin astronauts. 905 00:40:06,821 --> 00:40:08,656 - They call it the Twin program. 906 00:40:08,656 --> 00:40:11,951 Astronauts Scott Kelly spends 340 days 907 00:40:11,951 --> 00:40:14,412 at the space station orbiting in space. 908 00:40:14,412 --> 00:40:18,333 His twin brother Mark, remains on Earth as a control. 909 00:40:18,333 --> 00:40:20,084 The results are astonishing. 910 00:40:20,919 --> 00:40:24,255 - [Don] Despite the exercise regimen and the countermeasures, 911 00:40:24,255 --> 00:40:27,008 Scott experiences a loss of bone density 912 00:40:27,008 --> 00:40:28,301 and muscle breakdown. 913 00:40:28,301 --> 00:40:30,929 He arrives back on Earth two inches taller 914 00:40:30,929 --> 00:40:33,389 because his spinal discs have expanded. 915 00:40:34,682 --> 00:40:36,476 - [Lance] What is most astonishing 916 00:40:36,476 --> 00:40:39,145 is that he has changed genetically. 917 00:40:39,145 --> 00:40:41,314 His genes, in terms of bone formation, 918 00:40:41,314 --> 00:40:44,442 DNA repair, and oxygen are actually different. 919 00:40:44,442 --> 00:40:47,445 Long-term space travel affects the human body 920 00:40:47,445 --> 00:40:49,322 on the cellular genetic level, 921 00:40:49,322 --> 00:40:52,075 and some of these changes are permanent. 922 00:40:52,075 --> 00:40:53,952 And without the International Space Station, 923 00:40:53,952 --> 00:40:55,745 science would never have known that. 924 00:40:56,871 --> 00:40:58,414 - Whether it's the first pages 925 00:40:58,414 --> 00:41:00,458 rolling off the printing press, 926 00:41:00,458 --> 00:41:04,587 or the ISS charting a course to our future in space, 927 00:41:04,587 --> 00:41:05,922 through our time, 928 00:41:05,922 --> 00:41:08,883 trailblazers have invented new machines 929 00:41:08,883 --> 00:41:10,969 to reshape the world. 930 00:41:10,969 --> 00:41:14,305 These change agents didn't wait for permission. 931 00:41:14,305 --> 00:41:15,682 They kick down the door. 932 00:41:15,682 --> 00:41:18,393 [intense music] 73511

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