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These are the user uploaded subtitles that are being translated: 1 00:01:38,750 --> 00:01:45,870 Our Milky Way is just one among billions of galaxies in the universe. 2 00:01:48,190 --> 00:01:55,370 In every way, an ordinary galaxy is 3 00:02:00,580 --> 00:02:02,720 a hundred thousand light years ago. 4 00:02:15,590 --> 00:02:20,510 There are hundreds of millions of stars here. 5 00:02:29,530 --> 00:02:32,610 Almost lost inside this huge swarm. 6 00:02:32,611 --> 00:02:36,290 It's one average sized star. 7 00:02:38,740 --> 00:02:41,680 As stars go, it's quite unremarkable. 8 00:02:43,240 --> 00:02:49,480 Nevertheless, it's the most special place in all the cosmos. 9 00:02:54,100 --> 00:03:01,700 Or, but in this star, is the only place we know in all the universe to harbor life. 10 00:03:02,300 --> 00:03:03,300 Our 11 00:03:30,850 --> 00:03:38,850 beautiful planet is a world of water, sparkling blue in the light of our star. 12 00:03:43,070 --> 00:03:44,970 Two-thirds of it is ocean. 13 00:03:48,930 --> 00:03:53,650 Gossamer clouds drift above it, driven by ocean curves. 14 00:03:56,410 --> 00:04:02,570 All of it is wrapped in a delicate cocoon of air that shields us. 15 00:04:02,571 --> 00:04:05,170 From our star's radiation. 16 00:04:13,650 --> 00:04:18,080 Three brave explorers are about to leave the safety of Earth. 17 00:04:24,330 --> 00:04:32,211 They are an American, Terry Burks, a Russian, Anton Scott Lara, and an Italian. 18 00:04:32,450 --> 00:04:33,930 Samantha Christopher ready. 19 00:04:36,710 --> 00:04:43,391 Their mission, six months in space to study microgravity, do biomedical research. 20 00:04:43,710 --> 00:04:44,910 And observe the Earth. 21 00:04:46,250 --> 00:04:50,090 They're sealed inside this tiny metal cocoon. 22 00:04:50,700 --> 00:04:57,130 A Russian Soyuz spacecraft, traveling at 17,500 miles an hour. 23 00:04:58,530 --> 00:05:03,210 Their destination, the International Space Station. 24 00:05:05,920 --> 00:05:08,610 It was built in orbit by 16 countries. 25 00:05:10,970 --> 00:05:13,190 It's a research lab training facility. 26 00:05:13,990 --> 00:05:19,290 And observatory, all powered by the Sun. 27 00:05:20,705 --> 00:05:25,910 A truly awesome example of what we can achieve when we work together. 28 00:05:47,020 --> 00:05:50,190 All ready on board to welcome the new arrivals. 29 00:05:51,110 --> 00:05:56,490 Russian crew members, Sasha Samakoujev, and Yelena Serova. 30 00:05:58,770 --> 00:06:05,510 The arrival to the space station was tossed by the happiest home to my life, really. 31 00:06:05,670 --> 00:06:08,610 And then they were Yelena's session, which welcomed us on board. 32 00:06:10,210 --> 00:06:12,130 And, you know, it was just sheer happiness. 33 00:06:12,610 --> 00:06:13,770 We hugged, really. 34 00:06:13,771 --> 00:06:15,950 You know, I was, like, a child at that point. 35 00:06:16,305 --> 00:06:18,310 I mean, it's something I had dreamed of for years. 36 00:06:18,810 --> 00:06:20,090 I had started the space station. 37 00:06:20,210 --> 00:06:22,530 I'd work so hard together and finally I was there. 38 00:06:26,220 --> 00:06:29,530 Terry is welcomed. 39 00:06:29,690 --> 00:06:30,810 I command her, but you will. 40 00:06:41,270 --> 00:06:43,990 Butch describes the crazy scene. 41 00:06:44,590 --> 00:06:48,026 As I watched Anton, I mean, he was thrilled and doing 42 00:06:48,027 --> 00:06:50,431 flips and excited floating around getting the ceiling. 43 00:06:53,250 --> 00:06:56,750 Samantha, to look on her face, just absolutely thrilling. 44 00:06:57,370 --> 00:06:58,826 It was literally electric in the room. 45 00:06:58,850 --> 00:06:59,990 It was, it was fabulous. 46 00:07:00,330 --> 00:07:02,750 Samantha recalls her first-ever view. 47 00:07:03,050 --> 00:07:04,050 From space. 48 00:07:04,630 --> 00:07:06,670 But I just couldn't resist taking a peek. 49 00:07:09,485 --> 00:07:14,370 And I could just see the earth majestically flowing by. 50 00:07:14,530 --> 00:07:15,690 I was like a river. 51 00:07:19,150 --> 00:07:24,003 And, you know, I don't know what, what happiness 52 00:07:24,004 --> 00:07:28,030 is, but I was definitely happier that time. 53 00:07:28,031 --> 00:07:30,430 How do you say the couple? 54 00:07:32,710 --> 00:07:37,226 The couple is a magical window, unlike any other, 55 00:07:37,227 --> 00:07:41,830 on the spectacle of our earth and ourselves. 56 00:07:44,015 --> 00:07:47,010 Past, present, and future. 57 00:07:55,470 --> 00:08:02,150 When I always found especially moving where the past is where we would fly from 58 00:08:02,151 --> 00:08:06,310 the Atlantic, and then fly over Gibraltar onto the Mediterranean. 59 00:08:07,010 --> 00:08:12,270 It was almost like I was doing this journey that, you know, travelers from 60 00:08:12,271 --> 00:08:17,730 legends and myths and the past that dream talk were performed in the reverse way, 61 00:08:18,010 --> 00:08:20,630 right, from the Mediterranean, through Gibraltar, which, you know, 62 00:08:20,870 --> 00:08:22,790 once was considered the end of the known world. 63 00:08:24,410 --> 00:08:30,670 More than 500 years ago, explorers rounded the stormy tip of South Africa. 64 00:08:32,030 --> 00:08:37,370 As an omen for future trade, they named it the Cape of Good Hope. 65 00:08:39,700 --> 00:08:42,682 At the same time, the glorious Caribbean 66 00:08:42,683 --> 00:08:47,251 beckoned with the untold riches of the new world. 67 00:08:50,300 --> 00:08:57,540 Aboriginal people came from Asia more than 30,000 years ago, bringing their spiritual 68 00:08:57,541 --> 00:09:03,520 ties to this land, the continent we now know as Australia. 69 00:09:10,220 --> 00:09:17,550 The Maori people from Polynesia traveled thousands of miles in tiny canoes across 70 00:09:17,600 --> 00:09:21,750 the Pacific Ocean before they reached New Zealand. 71 00:09:26,370 --> 00:09:32,990 Home to the ancient Inca civilization, the longest mountain range in the world, 72 00:09:33,610 --> 00:09:34,610 the Andes. 73 00:09:35,605 --> 00:09:42,090 They stretched 4,500 miles across some of the most extreme climate zones on earth, 74 00:09:42,830 --> 00:09:45,110 from ice fields to deserts. 75 00:09:48,460 --> 00:09:53,170 The oldest and driest desert is the Namib in Africa. 76 00:09:58,300 --> 00:10:03,460 You can see our climates from space, the Great Lakes of North America, 77 00:10:04,280 --> 00:10:09,400 like trapped in ice and snow, for more than a third of the year. 78 00:10:10,480 --> 00:10:15,120 You can also see evidence of earth's violent past. 79 00:10:16,940 --> 00:10:20,400 Asteroid impacts have left scars on its surface. 80 00:10:21,720 --> 00:10:25,940 This crater in Quebec is 62 miles across. 81 00:10:28,900 --> 00:10:33,960 The earth is still active, volcanoes tear through its surface. 82 00:10:34,900 --> 00:10:39,960 The Kamchatka Peninsula in Russia has over 100 of them. 83 00:10:43,340 --> 00:10:46,200 Now Terry Birds describes his experience. 84 00:10:47,060 --> 00:10:50,640 One of the most beautiful things to see from space is thunderstorms at night, 85 00:10:50,920 --> 00:10:52,800 and there are certain parts of the earth. 86 00:10:53,160 --> 00:10:56,220 Central Africa especially, but also Southeast Asia. 87 00:10:57,000 --> 00:10:59,540 There are just amazing amounts of thunderstorms. 88 00:10:59,541 --> 00:11:02,480 You see thousands of flashes per minute. 89 00:11:03,740 --> 00:11:06,900 Unbelievable amount of power when you think about a giant lightning bolt going 90 00:11:06,901 --> 00:11:09,778 off near house, and how loud it is, and how it 91 00:11:09,779 --> 00:11:12,040 scares you, and the dog runs under the table. 92 00:11:12,320 --> 00:11:16,301 When you see it from space, there's so many of these things happening at the same time. 93 00:11:16,800 --> 00:11:18,220 It's truly amazing. 94 00:11:24,920 --> 00:11:29,364 You see power of funnel 25 miles in diameter of the 95 00:11:29,365 --> 00:11:34,180 center of a hurricane or a typhoon, and you go, oh my. 96 00:11:35,140 --> 00:11:37,200 The typhoon, my second was amazing. 97 00:11:37,220 --> 00:11:38,920 I've never seen anything like that. 98 00:11:38,980 --> 00:11:40,980 I was so big, so well defined. 99 00:11:40,981 --> 00:11:47,080 Then you realize that that's energy, and it is power, powerful energy. 100 00:11:49,360 --> 00:11:54,040 Far above the storm, every drop of water is carefully rationed. 101 00:11:55,100 --> 00:11:57,439 There's no showers in space, so there's no... 102 00:11:57,440 --> 00:11:59,960 you can't just go under the water and let it run. 103 00:12:00,095 --> 00:12:03,115 It's just kind of wet towels and wiping down, but you can 104 00:12:03,195 --> 00:12:06,920 get pretty clean, and washing your hair is not too bad. 105 00:12:08,895 --> 00:12:11,295 In principle, we want to recycle all the water, which 106 00:12:11,296 --> 00:12:15,920 means that the urine gets recycled, but also your sweat. 107 00:12:16,040 --> 00:12:20,460 All the humidity from the air, which is accumulated into the system via 108 00:12:20,461 --> 00:12:24,920 the air conditioning system, also gets recycled into portable water. 109 00:12:26,460 --> 00:12:29,287 It's not 100% efficient system, so we do 110 00:12:29,288 --> 00:12:32,201 have water bags on the space station as well. 111 00:12:33,420 --> 00:12:37,960 The SpaceX resupply ship, called Dragon, arrives from Florida. 112 00:12:38,820 --> 00:12:41,820 It's one of the first commercial craft to bring up supplies. 113 00:12:42,140 --> 00:12:46,520 It brings food and water and equipment, and without that we wouldn't be able to 114 00:12:46,720 --> 00:12:48,880 live more than a few extra months on the space station. 115 00:12:50,200 --> 00:12:53,380 But on Earth, we kind of don't have any supply ships. 116 00:12:53,440 --> 00:12:56,436 It's almost like a mission to Mars when you're not going to get a supply ship. 117 00:12:56,460 --> 00:12:58,300 You have to pack everything with you. 118 00:13:01,320 --> 00:13:05,460 When we're all doing cargo ops together, I mean it is organized bedlam. 119 00:13:06,440 --> 00:13:10,100 It literally is crisscrossing people flying, packages flying, going here and 120 00:13:10,101 --> 00:13:11,640 there, and you have to get them in the right place. 121 00:13:11,641 --> 00:13:13,660 You can't put it in the wrong spot because you'll lose it. 122 00:13:13,661 --> 00:13:15,981 You won't be able to find it later because there's so much. 123 00:13:16,500 --> 00:13:17,660 Literally thousands of items. 124 00:13:18,020 --> 00:13:20,301 You can't remember where you put every single one of them. 125 00:13:20,360 --> 00:13:22,000 That's why we have to have this database. 126 00:13:22,120 --> 00:13:25,280 We lost a 14 inch torque wrench, and it was gone for five weeks. 127 00:13:25,380 --> 00:13:28,120 And it just floated off, I guess, and wouldn't have been looking cranny somewhere. 128 00:13:28,385 --> 00:13:30,900 It itself, and it finally reappeared one day. 129 00:13:46,100 --> 00:13:51,531 I like to sleep floating, so I did not attach my sleeping bag to the walls at all. 130 00:13:51,665 --> 00:13:53,762 And especially at the beginning, I would just close 131 00:13:53,812 --> 00:13:56,410 my eyes and let myself float and just fall asleep. 132 00:14:01,890 --> 00:14:04,430 Foot and Terrier are getting ready for a spacewalk. 133 00:14:05,915 --> 00:14:09,070 There are a lot of complex systems on the outside of this station. 134 00:14:09,820 --> 00:14:11,950 And sometimes they need fixing. 135 00:14:12,650 --> 00:14:15,890 If you want to go outside, of course, you have to survive in outer space. 136 00:14:16,470 --> 00:14:18,310 The suit allows you to do that. 137 00:14:18,790 --> 00:14:20,710 So much really fills out the suit. 138 00:14:21,330 --> 00:14:24,470 But it also means that when you're trying to put the suit on or taking off, 139 00:14:24,650 --> 00:14:25,650 it's quite some work. 140 00:14:28,640 --> 00:14:33,690 Getting out of the hatch is an entire operation in and of itself. 141 00:14:34,270 --> 00:14:35,710 We have so much equipment on us. 142 00:14:35,990 --> 00:14:40,050 Your backpack tends to bang into the hatch or helmet wants to bang into the hatch. 143 00:14:40,570 --> 00:14:43,910 You walk around by grabbing on the things with your gloves. 144 00:14:44,490 --> 00:14:47,650 Almost 300 degrees on the sun side of the space station. 145 00:14:47,770 --> 00:14:48,330 You get in the shade. 146 00:14:48,490 --> 00:14:49,910 It's minus 275 degrees. 147 00:14:50,310 --> 00:14:52,050 You fill that inside the suit. 148 00:14:53,090 --> 00:14:58,730 My fingertips in the sun light would be like a fill-um-on fire on most. 149 00:14:59,450 --> 00:15:01,627 From the fatigue a little bit, but also from the 150 00:15:01,727 --> 00:15:03,650 heat coming through on that sun side of the orbit. 151 00:15:03,651 --> 00:15:05,496 So I have to, you know, throw my fingers at 152 00:15:05,497 --> 00:15:07,130 times and put them in the shade a little bit. 153 00:15:07,365 --> 00:15:08,650 Let them pull down. 154 00:15:11,770 --> 00:15:13,510 You can lose where you are on station. 155 00:15:13,790 --> 00:15:16,910 So you're always thinking you have a safety tether attached to station. 156 00:15:17,250 --> 00:15:18,910 It's on a reel like a fishing reel. 157 00:15:18,990 --> 00:15:21,310 That thing with a spring that always reels it in. 158 00:15:21,810 --> 00:15:26,530 You can be upside down, twisted and inverted, and completely lose your spacial 159 00:15:26,531 --> 00:15:29,070 awareness about where you are and what your attitude is. 160 00:15:29,071 --> 00:15:32,330 And you can easily get tangled up in that safety tether. 161 00:15:32,580 --> 00:15:33,970 If you're not cautious. 162 00:15:35,250 --> 00:15:41,790 Every single movement you may, you're making an effort to think through it. 163 00:15:43,410 --> 00:15:46,510 The outside of the space station is not just a sidewalk. 164 00:15:46,890 --> 00:15:50,370 It's a jungle of wires and equipment. 165 00:15:51,570 --> 00:15:54,790 Metal bars and trusses. 166 00:15:55,630 --> 00:15:58,826 Well, if you accidentally sliced your glove or your spacesuit 167 00:15:58,827 --> 00:16:01,950 on one of those sharp edges, that could create a leak. 168 00:16:02,550 --> 00:16:05,190 And if that leak were big enough, you would die. 169 00:16:10,220 --> 00:16:16,760 The hardest thing during a spacewalk for me is getting out of the hut. 170 00:16:18,700 --> 00:16:23,800 And so the only way that we found to actually get a boat to come out of the 171 00:16:23,801 --> 00:16:29,120 upper torso of the hut was for me to basically push and shake and push and 172 00:16:29,121 --> 00:16:31,960 shake until it finally was able to frame itself from the suit. 173 00:16:54,810 --> 00:16:58,050 How it is in space were great, but to be honest, I missed home. 174 00:16:59,130 --> 00:17:01,819 Of course, we didn't want to leave Santa hanging if there's 175 00:17:01,820 --> 00:17:05,230 somebody that you don't want to make mad at Santa Claus. 176 00:17:05,470 --> 00:17:07,450 So we put the milk and cookies in the airlock. 177 00:17:07,730 --> 00:17:11,430 We weren't sure exactly how he would get in the space station, but we assumed the 178 00:17:11,431 --> 00:17:13,512 airlock would be kind of our equivalent of a chimney. 179 00:17:14,045 --> 00:17:17,010 So, we thought that would be a good place to leave the milk and cookies. 180 00:17:34,830 --> 00:17:37,750 My speak three language, I speak English, Russian, and Tennessee. 181 00:17:40,645 --> 00:17:43,485 As you're learning Russian, they say the first ten years at the hardest. 182 00:17:44,870 --> 00:17:45,950 That's a fact. 183 00:17:48,790 --> 00:17:52,810 And then all of a sudden, the day arrives, boom, and it's time to go home. 184 00:17:53,890 --> 00:17:59,510 The Soyuz spacecraft is ready to take butch, Sasha, and Yolena home. 185 00:18:00,650 --> 00:18:03,286 And of course, you're looking forward, you're coming home, you're wife, 186 00:18:03,310 --> 00:18:05,110 your family's been away from for eight months. 187 00:18:07,150 --> 00:18:10,390 But of course, the people that you're leaving behind today, you spent six months 188 00:18:10,391 --> 00:18:14,190 with them, and it's a very mellow column filling because the hat shuts, 189 00:18:14,510 --> 00:18:15,030 and they're going. 190 00:18:15,510 --> 00:18:19,310 And you realize that part of your life is over, and you're not going to have this 191 00:18:19,311 --> 00:18:21,290 same fellowship with those people ever again. 192 00:18:21,990 --> 00:18:23,490 And it's a sad thing. 193 00:18:41,220 --> 00:18:46,420 In space without gravity pulling you down, you grow, and I grew almost two inches. 194 00:18:47,160 --> 00:18:50,840 Unfortunately, the minute I got back to Earth, I lost those. 195 00:18:51,040 --> 00:18:53,993 In zero G, without the loading of gravity, your 196 00:18:53,994 --> 00:18:57,421 bones and muscles will weaken very quickly. 197 00:18:58,680 --> 00:19:04,840 To stay in shape, it's extremely important for the crews to exercise a lot. 198 00:19:07,870 --> 00:19:10,143 And we have two and a half hours of exercise 199 00:19:10,144 --> 00:19:13,260 scheduled every day, and that includes cardio. 200 00:19:14,560 --> 00:19:16,640 And this marvelous machine, which is called A-RIT. 201 00:19:17,040 --> 00:19:21,460 And you can do things like squats, and deadlifts, and shoulder presses. 202 00:19:24,710 --> 00:19:27,260 So this is a great example of no three being busy. 203 00:19:27,261 --> 00:19:30,345 I'm working on the bathroom, and there's a lot of 204 00:19:30,346 --> 00:19:33,620 plumbing and valves and systems that I was changing. 205 00:19:33,720 --> 00:19:35,340 I'll also have some exercise in there. 206 00:19:35,500 --> 00:19:38,680 It's a busy place, but it's important to keep this equipment working. 207 00:19:40,560 --> 00:19:43,600 All right, Smith, I'm going to put the final lip in here. 208 00:19:44,860 --> 00:19:49,060 I kept joking that he wouldn't be qualified for his flight unless he came 209 00:19:49,061 --> 00:19:51,660 with me to my hairdresser to learn how to cut my hair. 210 00:19:52,260 --> 00:19:53,820 All the things we do is astronauts. 211 00:19:54,080 --> 00:19:55,080 This scares me the most. 212 00:19:58,110 --> 00:20:00,960 For the crews that live on the station, one of the 213 00:20:00,961 --> 00:20:03,721 most important things of all is being able to see. 214 00:20:04,300 --> 00:20:08,840 From day to day, what we down here on the ground can't see so clearly. 215 00:20:10,040 --> 00:20:15,840 What is happening to our Earth, and how we are changing it. 216 00:20:19,110 --> 00:20:24,440 We began with a home of lush green forests, animals, and plants. 217 00:20:26,380 --> 00:20:30,760 With more and more of us to feed, we began clearing the land for farms. 218 00:20:30,761 --> 00:20:38,100 But when you cut down the trees, there are other losses too. 219 00:20:39,160 --> 00:20:42,220 Great forests once covered much of the island of Madagascar. 220 00:20:45,100 --> 00:20:47,300 You can see how many of them are gone. 221 00:20:48,640 --> 00:20:52,127 Without tree roots to anchor it, the red soil loses 222 00:20:52,128 --> 00:20:56,040 downhill, clogging the rivers, and banishing into the sea. 223 00:20:58,980 --> 00:21:03,780 Unique animals, like the lemurs, are losing their homes. 224 00:21:09,740 --> 00:21:13,960 The great rainforest in Brazil continues to disappear. 225 00:21:15,900 --> 00:21:19,760 It's home to nearly half the species found on Earth. 226 00:21:22,400 --> 00:21:30,640 In just four decades, almost half a million square miles have been cut down and burned. 227 00:21:35,920 --> 00:21:39,786 From space, you can see huge smoke plumes stretching 228 00:21:39,787 --> 00:21:43,360 across the rainforest for hundreds of miles. 229 00:21:45,115 --> 00:21:50,160 Thousands of species up in smoke forever lost. 230 00:21:52,060 --> 00:21:55,859 As the forest burned, carbon dioxide and other 231 00:21:55,860 --> 00:21:59,381 greenhouse gases spew into our atmosphere. 232 00:22:04,010 --> 00:22:10,010 We've always taken our fresh air for granted, but we know now that the fossil 233 00:22:10,011 --> 00:22:14,470 fuels be burned also released clouds of pollution into the air we breathe. 234 00:22:15,690 --> 00:22:19,430 They fill the atmosphere with gases that cause the climate to change. 235 00:22:21,530 --> 00:22:25,490 As a result, the Earth's temperature is rising. 236 00:22:30,280 --> 00:22:35,020 In California, it's affecting our most precious resource on Earth. 237 00:22:36,080 --> 00:22:37,080 Water. 238 00:22:37,720 --> 00:22:40,220 Seeing California is beautiful from space. 239 00:22:40,780 --> 00:22:45,100 It actually looks like a giant ice cream scooper went right down the middle part of 240 00:22:45,101 --> 00:22:46,861 the state and scooped out the central valley. 241 00:22:47,235 --> 00:22:51,520 But it's very brown, and you can really tell there's a drought going on, 242 00:22:51,780 --> 00:22:53,860 and that they could probably use a lot of rain. 243 00:22:55,260 --> 00:23:00,620 In efforts to save parched crops, we used ground water so much of it in the 244 00:23:00,720 --> 00:23:05,300 last 75 years that parts of the valley have sunk 30 feet. 245 00:23:06,000 --> 00:23:09,703 The life of ranchers and farmers depend on water 246 00:23:09,704 --> 00:23:13,161 rights and who can take what water out of whichever. 247 00:23:13,840 --> 00:23:16,879 Even cities like San Diego, Los Angeles and 248 00:23:16,954 --> 00:23:20,280 Phoenix depend completely on their access to water. 249 00:23:21,420 --> 00:23:27,900 The Colorado River Basin supplies water to 40 million of us in seven states. 250 00:23:29,980 --> 00:23:35,320 The reservoirs that make this system work are losing water at alarming rates. 251 00:23:36,900 --> 00:23:40,967 They need huge amounts of runoff from snow to feed 252 00:23:40,968 --> 00:23:44,560 them, and the runoff has dwindled in recent years. 253 00:23:46,540 --> 00:23:49,980 California's reservoirs could soon be dry. 254 00:23:59,400 --> 00:24:05,135 I had never seen the Himalayas at all, and the immense size was just... 255 00:24:05,136 --> 00:24:06,180 it was mind -boggling. 256 00:24:06,181 --> 00:24:08,680 They just went on for hundreds and hundreds of miles. 257 00:24:13,940 --> 00:24:18,540 In the shadow of Mount Everest, several of the Earth's great rivers begin 258 00:24:18,740 --> 00:24:21,340 their journey across the Indian subcontinent. 259 00:24:22,410 --> 00:24:27,980 They provide water to drink, irrigation for crops, a place for worship. 260 00:24:28,030 --> 00:24:34,240 But now, the rising temperatures are causing glaciers and snow high on the 261 00:24:34,390 --> 00:24:35,720 plateau to melt. 262 00:24:37,540 --> 00:24:42,800 The water supply of over 500 million people is now threatened. 263 00:24:46,285 --> 00:24:50,325 By the time the rivers reach the Ganges Delta, they've become 264 00:24:50,326 --> 00:24:54,520 pipelines for all kinds of pollution, pouring into the sea. 265 00:24:58,940 --> 00:25:05,431 But problems like this can be solved, and when we work at it, sometimes we succeed. 266 00:25:07,110 --> 00:25:11,370 When I was a kid in the 70s, the Chesapeake Bay was a mess. 267 00:25:11,610 --> 00:25:14,570 The fish and crabs were disappearing, and there was a big restriction. 268 00:25:14,790 --> 00:25:17,010 You couldn't fish or rock fish and other types of fish. 269 00:25:17,200 --> 00:25:21,550 It's been cleaned up, and in a few decades time it's a beautiful place now. 270 00:25:21,890 --> 00:25:22,370 It's thriving. 271 00:25:22,845 --> 00:25:25,270 That's a great success story of conservation. 272 00:25:32,360 --> 00:25:36,760 It's a giant universe out there, but there's nowhere like earth. 273 00:25:36,800 --> 00:25:37,960 It's a beautiful planet. 274 00:25:38,980 --> 00:25:40,640 We have air that we can breathe. 275 00:25:40,680 --> 00:25:42,020 We have water that we can drink. 276 00:25:42,740 --> 00:25:44,160 Food is there for us. 277 00:25:44,980 --> 00:25:47,410 We have this life support system that's 278 00:25:47,411 --> 00:25:50,060 perfectly designed to support billions of humans. 279 00:25:50,440 --> 00:25:52,652 It's pretty amazing to see how much effort we had to 280 00:25:52,653 --> 00:25:55,081 put into designing and building the space station. 281 00:25:56,400 --> 00:26:00,800 But what if our surface water disappeared altogether? 282 00:26:05,860 --> 00:26:10,240 This actually happened on our neighboring planet Mars. 283 00:26:30,740 --> 00:26:33,090 Mars doesn't have a magnetic field. 284 00:26:34,210 --> 00:26:39,270 Without any protection, its atmosphere was ripped away from the planet by the solar 285 00:26:39,445 --> 00:26:40,445 wind. 286 00:26:44,460 --> 00:26:50,870 If you could stand on Mars today, you would find a landscape of lifeless desolation. 287 00:26:52,330 --> 00:26:55,350 Very cold and very dry. 288 00:27:00,775 --> 00:27:05,040 But on earth, things are going in a very different direction. 289 00:27:07,740 --> 00:27:12,420 I sense snow are melting at rates we've never seen before. 290 00:27:12,940 --> 00:27:16,639 In Greenland, time lapse cameras captured a 23 291 00:27:16,640 --> 00:27:20,661 square mile chunk of the Yacabsoven Glacier. 292 00:27:22,260 --> 00:27:23,820 Breaking off. 293 00:27:28,440 --> 00:27:30,580 The Greenland ice sheet is melting. 294 00:27:33,590 --> 00:27:38,960 If the whole ice sheet were to melt, sea levels could rise 20 feet. 295 00:27:41,630 --> 00:27:46,500 As the level rises, low-lying coastal areas will submerge. 296 00:27:48,490 --> 00:27:51,120 The city of New Orleans could be gone. 297 00:27:57,790 --> 00:28:03,080 But we can change this if we step up to limit greenhouse gases reproducing. 298 00:28:05,165 --> 00:28:10,381 As human beings, we need to start to consider some more and more as crew members. 299 00:28:10,830 --> 00:28:13,560 Not passengers, you know, nobody gets free ride. 300 00:28:15,120 --> 00:28:18,000 Do you have a responsibility to take care of your fellow crewmates? 301 00:28:18,280 --> 00:28:19,656 Just like we do on the space station. 302 00:28:19,680 --> 00:28:23,060 It's more difficult to do it when you're talking about billions of people. 303 00:28:23,440 --> 00:28:26,640 But that's really the mindset that we have to work towards. 304 00:28:35,105 --> 00:28:37,110 A new crew has arrived at the station. 305 00:28:37,335 --> 00:28:44,891 Two Russians, Gennady Padulka, and Mihayil, Corienko, and an American Scott Kelly. 306 00:28:45,710 --> 00:28:51,630 The mission for both Scott and Mihayil is to spend a full year here, so researchers 307 00:28:51,655 --> 00:28:54,590 can study how they're affected by long -term space travel. 308 00:28:56,830 --> 00:28:59,270 Scott is soon providing data for his study. 309 00:29:00,610 --> 00:29:05,110 One of the more recent discoveries in terms of the effects of weightlessness on 310 00:29:05,111 --> 00:29:09,090 human physiology is the effect that he has on our eyes. 311 00:29:10,095 --> 00:29:14,930 Several crew members, long-duration crew members in the past, have reported the 312 00:29:14,931 --> 00:29:18,330 worsening of their eyesight while they were up in space. 313 00:29:27,860 --> 00:29:31,480 I think the space is present machine. 314 00:29:31,970 --> 00:29:34,576 It was developed in Italy, and we actually, for the 315 00:29:34,577 --> 00:29:37,260 first time, could enjoy a good espresso in space. 316 00:29:38,580 --> 00:29:39,320 So, welcome change. 317 00:29:39,460 --> 00:29:43,700 I'm actually going to try and drink it out of this zero-G cup. 318 00:29:44,030 --> 00:29:45,030 Let's see what happens. 319 00:29:46,000 --> 00:29:47,260 Very much an experiment. 320 00:29:49,570 --> 00:29:53,260 But, it'd be a last nicer if I get to drink my espresso from an actual cup 321 00:29:53,610 --> 00:29:54,610 instead of from a punch. 322 00:29:55,780 --> 00:29:56,780 See. 323 00:30:11,970 --> 00:30:13,560 Wow, that was good. 324 00:30:14,560 --> 00:30:15,560 That was really good. 325 00:30:17,940 --> 00:30:21,480 Six months have passed, and it's time for Terry, 326 00:30:21,481 --> 00:30:25,021 Samantha, and Anton to say their goodbyes. 327 00:30:29,720 --> 00:30:31,170 It's a bittersweet departure. 328 00:30:51,110 --> 00:30:53,330 Three new crew members have moved in. 329 00:30:55,190 --> 00:30:58,373 They've said about a special project, which will be very 330 00:30:58,374 --> 00:31:01,610 important when people take longer journeys to other planets. 331 00:31:03,190 --> 00:31:06,610 The best results are produced in this pink light. 332 00:31:07,610 --> 00:31:11,810 Without soil, the crew is attempting to grow their own crops. 333 00:31:13,470 --> 00:31:17,470 Childlingrin, an American medical doctor, inspects the progress. 334 00:31:18,910 --> 00:31:22,094 Veggie was an amazing experiment, not only because we got 335 00:31:22,094 --> 00:31:26,930 to grow this plant in space, but we also got to eat it. 336 00:31:27,130 --> 00:31:31,190 Chels' crew mate, Kimi Ayui, is from Japan. 337 00:31:32,330 --> 00:31:34,070 Well, I know that I enjoyed the lettuce. 338 00:31:35,150 --> 00:31:37,530 I think Kimi is not a big fan of vegetables. 339 00:31:38,990 --> 00:31:40,650 His father is actually a lettuce farmer. 340 00:31:41,835 --> 00:31:44,310 And so, I think he's had a lot of lettuce. 341 00:31:45,270 --> 00:31:47,790 Happily, fresh food is about to arrive. 342 00:31:48,210 --> 00:31:51,810 This time, on the Japanese HTV resupply ship. 343 00:31:54,400 --> 00:31:56,770 Childlingrin is completely delicious. 344 00:31:56,870 --> 00:31:59,490 It's like a golden treasure, markai. 345 00:31:59,610 --> 00:32:01,470 Who will show you how x3? 346 00:32:02,880 --> 00:32:05,710 We have to share your belief, Phurya. 347 00:32:07,340 --> 00:32:13,990 We have to share your belief. 348 00:32:43,030 --> 00:32:47,020 We are approaching England and its great capital London. 349 00:32:48,440 --> 00:32:53,780 Across the English Channel to the right is France and the glorious city of Paris. 350 00:32:54,940 --> 00:32:56,460 Europe lies beyond. 351 00:32:57,780 --> 00:33:01,660 During the daytime it's kind of hard to tell that people are on earth. 352 00:33:02,500 --> 00:33:04,520 You don't see that much evidence of humanity. 353 00:33:10,105 --> 00:33:14,640 But at night the same view tells a different story. 354 00:33:15,320 --> 00:33:19,020 It's easy to see how populated our planet really is. 355 00:33:19,920 --> 00:33:23,460 And how many of us have gathered in towns and cities. 356 00:33:25,500 --> 00:33:29,400 Now you can spot famous cities like Amsterdam, Brussels. 357 00:33:34,000 --> 00:33:36,660 The capital of Russia, Moscow. 358 00:33:40,680 --> 00:33:48,000 The vibrant cities of Japan, Osaka, Nagoya and Tokyo. 359 00:33:49,540 --> 00:33:52,680 Beloved Rome and Naples. 360 00:33:54,500 --> 00:33:58,120 Italy at Midas is very moving because it's incredibly bright. 361 00:33:58,405 --> 00:34:02,340 It's a dancing populated country for some so you can really see all the cities. 362 00:34:02,540 --> 00:34:07,540 And you have this very distinct shape that you can very definitely see at Midas well. 363 00:34:07,541 --> 00:34:12,520 Of this boat reaching into this darkness of Mediterranean. 364 00:34:17,110 --> 00:34:20,270 This is just overwhelmingly beautiful. 365 00:34:21,690 --> 00:34:24,932 The undulating ribbon of light is the Nile River 366 00:34:24,933 --> 00:34:29,030 illuminated by people drawn from the desert to its water. 367 00:34:29,810 --> 00:34:33,848 Cairo gleams like a jewel in the Delta's crown to the 368 00:34:33,849 --> 00:34:37,450 left, Israel and the cities of Tel Aviv and Jerusalem. 369 00:34:39,510 --> 00:34:45,470 I think one of the most amazing sites I saw with my eye was coming across the 370 00:34:45,471 --> 00:34:49,319 Southern United States Florida into the Caribbean 371 00:34:49,320 --> 00:34:52,850 Sea through the Bahamas at night with a full moon. 372 00:34:53,250 --> 00:34:57,010 And you could literally see the colors, the aqua colors in the Bahamas area. 373 00:34:57,390 --> 00:35:02,510 All the way down into through Cuba and then Dominican Republic Haiti on into 374 00:35:02,511 --> 00:35:05,050 Puerto Rico and in Virgin Islands beyond that. 375 00:35:05,350 --> 00:35:06,510 Oh, my goodness. 376 00:35:10,400 --> 00:35:13,281 Fish and boats really stand out at night, especially 377 00:35:13,282 --> 00:35:15,380 in Asia and the Anaman Sea and near Thailand. 378 00:35:15,600 --> 00:35:17,420 There's a bunch of green fishing boats. 379 00:35:17,980 --> 00:35:20,496 During the day, you can't tell there's people in the ocean down there. 380 00:35:20,520 --> 00:35:22,640 But in nighttime, there's lots of folks fishing. 381 00:35:23,100 --> 00:35:24,100 You can see that. 382 00:35:25,840 --> 00:35:27,140 I can see where I was born. 383 00:35:27,440 --> 00:35:29,660 Murfersboro looks like a little diamond below Nashville. 384 00:35:30,460 --> 00:35:31,980 North of that, Louisville. 385 00:35:32,420 --> 00:35:35,060 Of course, Indianapolis just just beyond there. 386 00:35:35,840 --> 00:35:36,280 Pitsboro. 387 00:35:36,640 --> 00:35:38,140 And then looking to the left, you can see that. 388 00:35:38,141 --> 00:35:41,580 the Great Lakes and of course the cities of Green Bay, Chicago. 389 00:35:41,920 --> 00:35:44,480 You can see Cleveland evident, Buffalo. 390 00:35:45,320 --> 00:35:50,360 And then further up the East Coast, coming to Richmond, Washington, 391 00:35:50,940 --> 00:35:53,580 Baltimore, Philadelphia, New York. 392 00:35:53,940 --> 00:35:57,100 Long Island sticks out just absolutely gorgeous. 393 00:35:58,330 --> 00:36:01,960 Boston, Cape Cod, very visible, just absolutely beautiful. 394 00:36:02,240 --> 00:36:06,160 And then of course the cities across the border, Toronto, Ottawa, Montreal, 395 00:36:07,280 --> 00:36:08,280 Quebec City. 396 00:36:09,860 --> 00:36:14,340 Astronauts often remark that you don't see any national borders from space. 397 00:36:15,400 --> 00:36:16,440 But there are exceptions. 398 00:36:17,420 --> 00:36:20,078 The strand of orange light dividing the view 399 00:36:20,079 --> 00:36:23,261 is the border separating Pakistan from India. 400 00:36:23,950 --> 00:36:26,640 West that there weren't issues, but there are. 401 00:36:26,950 --> 00:36:28,880 We have different ideals and different mindsets. 402 00:36:29,360 --> 00:36:31,580 And it causes us to have the border. 403 00:36:32,460 --> 00:36:34,060 That is same. 404 00:36:36,250 --> 00:36:40,720 The most noticeable border at night is between North and South Korea. 405 00:36:42,440 --> 00:36:46,320 Seoul, South Korea is one of the brightest most vibrant cities on the planet. 406 00:36:46,400 --> 00:36:49,840 The whole South Korean country is lit up. 407 00:36:49,841 --> 00:36:53,080 And then there's this line of the border in this complete darkness. 408 00:36:53,130 --> 00:36:56,520 of North Korea with a few little white lights where Pyongyang is. 409 00:36:56,960 --> 00:36:59,600 But there's a similar number of people on both sides of the border. 410 00:36:59,700 --> 00:37:04,340 And you can really see the difference between how people live. 411 00:37:10,130 --> 00:37:13,542 By moonlight, the Gulf of Mexico and the great 412 00:37:13,543 --> 00:37:17,221 cities of Dallas, Houston and San Antonio. 413 00:37:17,880 --> 00:37:23,420 The landscape around them is a blaze with thousands of oil and gas flares. 414 00:37:24,320 --> 00:37:28,255 To meet our ever increasing energy needs for the future, we'll 415 00:37:28,256 --> 00:37:32,340 have to develop new energy sources on a far larger scale. 416 00:37:33,140 --> 00:37:35,820 And one of them is our own sun. 417 00:37:39,570 --> 00:37:44,838 As the space station crosses its face, from 250 miles 418 00:37:44,839 --> 00:37:48,900 below, you can see the solar panels that provide its power. 419 00:37:50,000 --> 00:37:55,080 Here on Earth, we must go beyond capturing the sun's rays and learn how to create 420 00:37:55,081 --> 00:37:59,620 energy the way the sun does by nuclear fusion. 421 00:38:00,880 --> 00:38:03,902 The challenge is to build a fusion reactor that 422 00:38:03,903 --> 00:38:07,681 will provide enough power for all our needs. 423 00:38:10,520 --> 00:38:14,578 If you can figure out how to reproduce this, you can 424 00:38:14,579 --> 00:38:19,080 create immense amounts of power and leave no pollution. 425 00:38:26,240 --> 00:38:31,480 Our sun also bombards us with lethal radiation. 426 00:38:35,625 --> 00:38:40,470 Without protection, most living creatures cannot survive it. 427 00:38:41,105 --> 00:38:47,300 But our Earth has a magnetic field which deflects the harmful particles away from us. 428 00:38:48,910 --> 00:38:53,010 The aurora shows that shield in action. 429 00:39:22,740 --> 00:39:24,980 The magnetic field protecting us. 430 00:39:26,000 --> 00:39:30,620 We have our forests and oceans, animals and people. 431 00:39:31,780 --> 00:39:35,220 It's why ours is a planet of life. 432 00:40:32,300 --> 00:40:38,510 What struck me looking at Earth on space is the fact that you can really perceive 433 00:40:38,960 --> 00:40:42,550 it visually as a spacecraft. 434 00:40:43,660 --> 00:40:47,193 I've heard before about space to Earth, but when you 435 00:40:47,194 --> 00:40:50,370 are up there, you really cannot escape that notion. 436 00:40:51,510 --> 00:40:56,190 It's totally obvious that it is a celestial body that is carrying all of us, 437 00:40:56,450 --> 00:41:00,910 all of humanity, all of life on Earth, on this journey through space. 438 00:41:01,260 --> 00:41:06,970 And just like the space station is a human -made outpost out there that allows us to 439 00:41:06,971 --> 00:41:13,070 survive in this hostile environment of space, our Earth is the same for all of 440 00:41:13,170 --> 00:41:14,170 us. 441 00:41:25,205 --> 00:41:28,262 I can imagine, of course, a future image of human 442 00:41:28,263 --> 00:41:31,380 beings who are able to travel to other star systems. 443 00:41:32,180 --> 00:41:38,100 So I really hope that at some point there will be a breakthrough in science and 444 00:41:38,101 --> 00:41:42,960 technology that will allow us to travel faster and light and actually explore 445 00:41:43,060 --> 00:41:44,320 different star systems. 446 00:41:48,450 --> 00:41:53,640 Don't you wonder sometimes, are there planets around other stars? 447 00:41:55,635 --> 00:41:57,120 Could they have life? 448 00:41:59,540 --> 00:42:04,580 Though we can't yet travel to the stars ourselves, our telescopes can. 449 00:42:05,880 --> 00:42:09,680 Astronomers have already discovered several thousand planets. 450 00:42:11,005 --> 00:42:16,940 We are searching around stars for the perfect conditions, not too hot, 451 00:42:17,620 --> 00:42:22,140 not too cold, for liquid water to exist. 452 00:42:23,520 --> 00:42:26,400 We call this the Goldilocks Zone. 453 00:42:31,280 --> 00:42:38,020 We can detect a planet as it crosses in front of a star, blocking its light. 454 00:42:39,220 --> 00:42:41,520 This is one system we found. 455 00:42:42,280 --> 00:42:43,280 Kepler-186. 456 00:42:44,460 --> 00:42:47,013 It's 500 light years from Earth and it 457 00:42:47,014 --> 00:42:50,901 contains a remarkable five Earth-sized planets. 458 00:42:52,520 --> 00:43:00,220 Most important of all, the outermost planet, Kepler-186F, is just the right 459 00:43:00,221 --> 00:43:05,860 distance from its star for water and life to exist. 460 00:43:18,480 --> 00:43:20,900 Could this be another Earth? 461 00:43:20,901 --> 00:43:21,901 It's 462 00:43:41,560 --> 00:43:43,680 about two things. 463 00:43:45,640 --> 00:43:52,040 It's about this great adventure of exploring and that it's about 464 00:43:52,041 --> 00:43:55,588 understanding how a world works and expanding 465 00:43:55,589 --> 00:44:00,820 the possibilities of what we human beings can do. 466 00:44:01,820 --> 00:44:04,760 And we can do great things together. 467 00:44:06,040 --> 00:44:11,386 If we all do our power for our children and great-grandchildren, 468 00:44:11,387 --> 00:44:15,680 our Earth will always be a beautiful planet. 469 00:45:37,625 --> 00:45:40,180 The sun is rising. 470 00:45:41,960 --> 00:45:47,440 It doesn't matter who you are, the sun still sets the same. 471 00:45:58,970 --> 00:46:01,090 This is how you break it. 43180

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