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Would you like to inspect the original subtitles? These are the user uploaded subtitles that are being translated: 1 00:00:00,000 --> 00:00:00,000 Edited at https://subtitletools.com 2 00:00:14,060 --> 00:00:16,930 Most people go through life trying to not get hit. 3 00:00:17,400 --> 00:00:18,400 What's up man? 4 00:00:18,460 --> 00:00:19,700 All good. 5 00:00:19,800 --> 00:00:20,900 Did you see that fight? 6 00:00:21,000 --> 00:00:23,530 Oh did I? I think I could've won. 7 00:00:25,200 --> 00:00:28,340 The trick is to roll with the punches and hope that you 8 00:00:28,440 --> 00:00:30,110 don't get floored by one. 9 00:00:31,910 --> 00:00:33,110 Again. 10 00:00:36,950 --> 00:00:38,810 Our world was born out of violence... 11 00:00:41,620 --> 00:00:44,420 and a storm that has raged since the beginning of time. 12 00:00:48,190 --> 00:00:50,960 A storm with the power to destroy planets. 13 00:00:54,330 --> 00:00:57,500 One mighty collision can change everything. 14 00:00:59,940 --> 00:01:02,640 It's done it before and it could do it again. 15 00:01:06,940 --> 00:01:11,580 Most of us live in blissful ignorance of the chaos around us. 16 00:01:13,380 --> 00:01:17,590 But, eight astronauts with over 1,000 days in space 17 00:01:18,390 --> 00:01:22,620 between them can tell us how being "up there" helped them 18 00:01:23,130 --> 00:01:26,460 to truly understand what goes on down here. 19 00:01:28,630 --> 00:01:31,970 Everyday the earth ploughs through about 40 tons 20 00:01:32,070 --> 00:01:34,170 of material in space. 21 00:01:36,840 --> 00:01:38,310 There is so much activity, 22 00:01:38,410 --> 00:01:41,840 so much action and our planet is right in the middle of it. 23 00:01:44,220 --> 00:01:46,820 Space isn't vast and empty space but a 24 00:01:47,590 --> 00:01:50,020 dynamic, cosmic storm. 25 00:01:52,960 --> 00:01:55,790 It's a storm that could kill us, 26 00:01:56,390 --> 00:01:58,690 but without it... 27 00:01:58,800 --> 00:02:01,300 we wouldn't be here at all. 28 00:02:02,700 --> 00:02:05,730 This is a story about the weird connections, 29 00:02:06,070 --> 00:02:10,340 the near misses, the lucky breaks that created 30 00:02:11,080 --> 00:02:13,680 this amazing world. 31 00:02:15,580 --> 00:02:19,620 For 4.5 billion years our planet has been battered and 32 00:02:19,720 --> 00:02:24,220 bruised and punched and pummeled but we're still standing. 33 00:02:30,030 --> 00:02:33,930 It's actually the battle that's built us and this is 34 00:02:34,030 --> 00:02:36,470 the tale of the tape. 35 00:02:47,550 --> 00:02:51,010 Thanks guys, awesome. Alright. 36 00:02:52,120 --> 00:02:56,790 Nicole Stott is an engineer, pilot and oh yeah... 37 00:02:57,450 --> 00:02:58,950 These are cool uh? 38 00:02:59,060 --> 00:03:01,660 She lived for three months in space. 39 00:03:02,230 --> 00:03:04,790 You can even stick your hand in it. 40 00:03:06,230 --> 00:03:07,300 Left hand. 41 00:03:07,400 --> 00:03:08,930 Okay I'm coming out. 42 00:03:09,030 --> 00:03:12,170 Nicole, your right waist tether to the forward UIAD ring. 43 00:03:12,270 --> 00:03:14,500 Frankly she's a bad ass. 44 00:03:16,740 --> 00:03:18,286 Now imagine them all pressurized and you're having 45 00:03:18,310 --> 00:03:20,540 to work against it really hard. 46 00:03:22,950 --> 00:03:25,680 Here I was, it was so unbelievable. 47 00:03:25,780 --> 00:03:29,150 I'd spent almost 20 years helping build spaceships and 48 00:03:29,250 --> 00:03:32,250 now here I was myself on one... 49 00:03:32,490 --> 00:03:34,390 just amazing. 50 00:03:34,490 --> 00:03:36,360 Okay I am clear Nicole. 51 00:03:36,460 --> 00:03:37,960 Remember watching me do a spacewalk? 52 00:03:38,060 --> 00:03:39,330 Yeah. 53 00:03:39,430 --> 00:03:42,230 - Yeah. Was that fun? - Scary. -Yeah, why was it scary? 54 00:03:42,870 --> 00:03:44,930 Cause I thought you were gonna fall off. 55 00:03:46,740 --> 00:03:49,970 When you're in space, 250 miles above our planet and 56 00:03:51,510 --> 00:03:54,080 looking at these things you thought you knew, 57 00:03:55,350 --> 00:03:58,110 you see them in a totally new way. 58 00:04:00,320 --> 00:04:05,820 For example, the first time I saw a shooting star from the 59 00:04:05,920 --> 00:04:11,260 space station was this very visual reminder that there's 60 00:04:12,430 --> 00:04:15,260 a lot of other things travelling through the 61 00:04:15,370 --> 00:04:17,930 same space, in space. 62 00:04:20,940 --> 00:04:23,070 What did I see and the first time I saw it, 63 00:04:23,170 --> 00:04:24,910 it kind of startled me was, 64 00:04:25,010 --> 00:04:27,940 a shooting star coming in below us. 65 00:04:28,810 --> 00:04:31,080 That's a micro meteorite coming into the earth and 66 00:04:31,180 --> 00:04:33,620 burning up in the atmosphere and you see this sort of 67 00:04:33,720 --> 00:04:36,550 firework display thing going on. 68 00:04:37,890 --> 00:04:40,960 I was doing earth observation and I'm taking a 69 00:04:41,060 --> 00:04:43,490 photo and all of a sudden I see a hole just magically 70 00:04:43,590 --> 00:04:46,130 appear about that big in the solar panel, you know, 71 00:04:46,230 --> 00:04:48,560 that was probably hit by a grain of sand, 72 00:04:48,670 --> 00:04:52,700 something that size, coming at 17,500 miles an hour in a different orbit. 73 00:04:55,410 --> 00:04:57,110 You get hit by rocks all the time, 74 00:04:57,210 --> 00:04:59,310 you can hear them ricocheting off the hull. 75 00:04:59,410 --> 00:05:02,240 You can see the scars of them in the windows of the spaceship. 76 00:05:05,420 --> 00:05:06,680 It's a little mind boggling, 77 00:05:06,780 --> 00:05:09,690 when you think about how much is really out there. 78 00:05:15,060 --> 00:05:17,760 Mostly the stuff up there is pretty small, 79 00:05:17,860 --> 00:05:21,160 burns up in the atmosphere, nothing to get worked up about, 80 00:05:21,270 --> 00:05:24,130 but there are some pretty big rocks up there too, 81 00:05:24,670 --> 00:05:26,940 ask the dinosaurs. 82 00:05:29,670 --> 00:05:31,856 We believe the asteroid that caused the extinction of the 83 00:05:31,880 --> 00:05:34,740 dinosaurs started way out in the solar system. 84 00:05:37,210 --> 00:05:39,920 You know, travelling that distance, 85 00:05:40,020 --> 00:05:44,020 it's incredible that it found this target of earth. 86 00:05:53,160 --> 00:05:57,930 ♪ ♪ 87 00:06:01,410 --> 00:06:04,570 Bad for the dinosaurs but ultimately good for us. 88 00:06:07,950 --> 00:06:10,650 We all think we know this story, 89 00:06:10,750 --> 00:06:14,320 but there's something special about the place where it happened, 90 00:06:14,420 --> 00:06:16,950 in the jungles of Mexico. 91 00:06:23,530 --> 00:06:25,890 Here in Mexico I have the chance to dive in 92 00:06:26,000 --> 00:06:31,170 what is the most magical place to free dive in the entire world. 93 00:06:43,080 --> 00:06:48,850 ♪ ♪ 94 00:06:51,520 --> 00:06:56,460 This incredible place was created with very strong 95 00:06:56,860 --> 00:07:00,100 violence when the asteroid hit. 96 00:07:04,130 --> 00:07:09,870 And the result of this is this calm place, this paradox. 97 00:07:23,990 --> 00:07:28,660 This place which is now very quiet was, at some point, 98 00:07:28,760 --> 00:07:32,330 where something dramatic happened. 99 00:07:41,240 --> 00:07:47,380 ♪ ♪ 100 00:07:52,080 --> 00:07:55,680 Life almost disappeared. 101 00:08:12,570 --> 00:08:17,340 But at the same time, this is where our story started and 102 00:08:17,440 --> 00:08:21,210 this is why we are here now. 103 00:08:29,890 --> 00:08:36,260 ♪ ♪ 104 00:08:45,800 --> 00:08:51,670 ♪ ♪ 105 00:09:01,690 --> 00:09:07,460 ♪ ♪ 106 00:09:16,430 --> 00:09:22,440 ♪ ♪ 107 00:09:32,020 --> 00:09:37,520 ♪ ♪ 108 00:09:40,590 --> 00:09:42,060 When this area was scanned, 109 00:09:42,160 --> 00:09:45,190 we saw that hundreds of these flooded Mexican caverns 110 00:09:45,300 --> 00:09:47,860 connected together into a vast semi-circle. 111 00:09:53,540 --> 00:09:55,640 The edges of a huge crater, 112 00:09:55,740 --> 00:09:59,340 110 miles across and 12 miles deep. 113 00:10:01,510 --> 00:10:04,350 An asteroid that big hitting the planet anywhere is going 114 00:10:04,450 --> 00:10:08,120 to be devastating, but scientists think it was 115 00:10:08,220 --> 00:10:11,390 especially devastating because of where it hit. 116 00:10:16,560 --> 00:10:20,360 A bulls eye strike on a large Sulphur reserve. 117 00:10:22,230 --> 00:10:25,400 The Sulphur rock vaporized sending billions of tons of 118 00:10:25,500 --> 00:10:29,240 polluting gas into the atmosphere... 119 00:10:29,340 --> 00:10:32,510 blocking out the sun. 120 00:10:32,610 --> 00:10:36,310 The earth froze and the dinosaurs died. 121 00:10:37,510 --> 00:10:40,620 So this big old asteroid has been journeying 122 00:10:40,720 --> 00:10:44,690 for billions of years through space before it gets to us and 123 00:10:44,790 --> 00:10:47,590 the earth spins right. 124 00:10:47,690 --> 00:10:51,660 So if the rock had arrived just a few seconds later, 125 00:10:51,760 --> 00:10:55,700 it would have crashed out in the deep ocean, no bulls eye, 126 00:10:56,570 --> 00:10:59,530 no fire storm, no dino extinction. 127 00:11:02,010 --> 00:11:05,740 Earth's history is full of moments like this. 128 00:11:06,440 --> 00:11:11,780 It's a tale of destructive good fortune that connects the 129 00:11:11,880 --> 00:11:15,750 death of a planet, ten million African bats, 130 00:11:18,190 --> 00:11:22,690 a clock in the sky and tiny rocks from the birth of our 131 00:11:22,790 --> 00:11:27,400 solar system, some about the size of my fist. 132 00:11:36,310 --> 00:11:39,270 There's a lot of rocks hitting us from space. 133 00:11:39,380 --> 00:11:42,480 If they make it through our atmosphere and hit the surface 134 00:11:42,580 --> 00:11:45,980 of our planet, people go in search of these in very remote 135 00:11:46,080 --> 00:11:49,020 places to try to find them. 136 00:11:49,120 --> 00:11:51,890 They're extremely valuable because they contain really 137 00:11:51,990 --> 00:11:54,260 the story of where our earth came from. 138 00:12:03,630 --> 00:12:04,930 Boom! 139 00:12:57,020 --> 00:13:00,290 In Morocco we have a couple of buzzes every year of 140 00:13:00,390 --> 00:13:02,820 something that's way cool, a super awesome meteorite. 141 00:13:07,360 --> 00:13:10,030 If a meteorite is found in the desert and word gets out... 142 00:13:14,570 --> 00:13:17,340 Especially if it's of extreme value. 143 00:13:20,810 --> 00:13:23,550 Then there is like a gold rush. 144 00:13:32,960 --> 00:13:39,160 ♪ ♪ 145 00:13:43,170 --> 00:13:46,400 We're talking about the building blocks of our planet. 146 00:13:56,450 --> 00:13:59,750 ♪ ♪ 147 00:13:59,850 --> 00:14:04,090 Some of the most valuable meteorites are carbonaceous chondrite meteorites. 148 00:14:05,390 --> 00:14:07,690 They're the oldest form of solid material in 149 00:14:07,790 --> 00:14:10,090 the solar system. 150 00:14:11,460 --> 00:14:14,600 All the universities want it, all the museums want it. 151 00:14:16,930 --> 00:14:19,870 The Bedouins are getting amazingly good at recognizing these things. 152 00:14:50,970 --> 00:14:53,330 To the untrained eye, these might just look like a 153 00:14:53,440 --> 00:14:57,710 normal rock, but the really old ones contain all the raw 154 00:14:57,810 --> 00:15:00,170 materials to build a planet like earth. 155 00:15:03,510 --> 00:15:06,380 4.6 billion years ago where earth is today, 156 00:15:06,480 --> 00:15:09,750 there was just a giant cloud of gas and dust, 157 00:15:10,020 --> 00:15:13,350 all swirling around the new born sun. 158 00:15:23,300 --> 00:15:29,300 ♪ ♪ 159 00:15:29,840 --> 00:15:32,810 This was where the cosmic storm started. 160 00:15:33,340 --> 00:15:36,210 First off with tiny particles attracted by 161 00:15:36,310 --> 00:15:38,350 an electrostatic force. 162 00:15:42,820 --> 00:15:45,950 It's a slow process but eventually clumps grew into 163 00:15:46,060 --> 00:15:49,160 solid matter. 164 00:15:51,030 --> 00:15:53,430 Still only as big as a grain of sand, 165 00:15:53,530 --> 00:15:56,000 but now with just enough gravity of their own to pull 166 00:15:56,100 --> 00:15:58,900 other grains in. 167 00:16:04,210 --> 00:16:07,610 These grains fused into rocks and as they smashed and 168 00:16:07,710 --> 00:16:11,210 clumped the collisions grew in intensity. 169 00:16:20,320 --> 00:16:22,290 Under immense heat and pressure, 170 00:16:22,390 --> 00:16:25,390 the rocks began to build our planet. 171 00:16:36,270 --> 00:16:38,670 There seems to be nothing subtle about the way 172 00:16:38,780 --> 00:16:41,240 earth was built. 173 00:16:41,580 --> 00:16:44,080 It would almost be like building a space station with 174 00:16:44,180 --> 00:16:45,950 a sledgehammer. 175 00:16:50,190 --> 00:16:52,420 All those bits smashing together, 176 00:16:52,760 --> 00:16:55,790 they were everything we needed to build a living planet. 177 00:16:55,890 --> 00:16:58,090 The calcium in our bones, the gold in our wedding rings, 178 00:16:58,730 --> 00:17:02,460 even the iron in our ships was all here from the beginning, 179 00:17:03,600 --> 00:17:07,400 except one thing was in short supply, water, 180 00:17:08,570 --> 00:17:11,710 but it was on its way and coming in fast. 181 00:17:18,900 --> 00:17:23,370 ♪ ♪ 182 00:17:23,470 --> 00:17:25,570 A lot of astronauts will tell you that from 183 00:17:25,670 --> 00:17:28,710 six years old watching the moon landing that they knew from 184 00:17:28,810 --> 00:17:31,640 that moment on that astronaut was a job that they 185 00:17:31,740 --> 00:17:34,310 wanted to do. 186 00:17:35,010 --> 00:17:37,810 For me, it wasn't that way. 187 00:17:39,080 --> 00:17:41,380 My background is aeronautical engineering. 188 00:17:41,490 --> 00:17:43,633 I wanted to do something with flying that allowed me to 189 00:17:43,660 --> 00:17:47,920 learn about how things fly and then ultimately if you wanna 190 00:17:48,630 --> 00:17:51,060 know how things fly, I can't imagine not wanting to know 191 00:17:51,160 --> 00:17:53,700 how rocket ships fly. 192 00:17:55,200 --> 00:17:57,670 And then one day I got this phone call to say that 193 00:17:58,300 --> 00:18:01,040 I was assigned to fly a long duration flight on the 194 00:18:01,140 --> 00:18:03,110 International Space Station. 195 00:18:04,980 --> 00:18:07,280 Nicole didn't set out to fly on the ISS, 196 00:18:07,380 --> 00:18:10,050 her job was to build the thing, 197 00:18:10,150 --> 00:18:13,350 but once she got up there, she still had an eye for design. 198 00:18:16,150 --> 00:18:17,850 So as an engineer you can imagine, 199 00:18:17,960 --> 00:18:20,790 I couldn't help but look at the earth and wonder, 200 00:18:20,890 --> 00:18:23,090 how does that work? 201 00:18:33,410 --> 00:18:37,740 What's blindingly obvious when you look at earth, 202 00:18:38,040 --> 00:18:41,580 is water is the key. 203 00:18:51,090 --> 00:18:57,190 ♪ ♪ 204 00:19:05,070 --> 00:19:09,570 But earlier it didn't look like this blue planet that I 205 00:19:09,670 --> 00:19:13,580 saw, it was a dry and baron rock. 206 00:19:16,250 --> 00:19:18,250 For life to thrive like it has done, 207 00:19:18,350 --> 00:19:22,790 the earth needed delivery of water. 208 00:19:23,090 --> 00:19:25,620 We believe soon after the earth was formed, 209 00:19:25,720 --> 00:19:28,760 our water came from space in a hail of violence. 210 00:19:38,570 --> 00:19:43,110 ♪ ♪ 211 00:19:49,610 --> 00:19:51,450 It must have been brutal. 212 00:19:51,550 --> 00:19:54,120 We think it lasted for about 100 million years. 213 00:20:03,660 --> 00:20:09,300 ♪ ♪ 214 00:20:18,180 --> 00:20:22,580 Icy comets and asteroids collided with the planet in that. 215 00:20:26,590 --> 00:20:29,490 To supply us with that top off of water. 216 00:20:39,100 --> 00:20:44,830 ♪ ♪ 217 00:20:50,640 --> 00:20:54,180 But unlike Mars and Venus, who were surely bombarded by 218 00:20:54,280 --> 00:20:56,980 the same storm, we kept our water. 219 00:20:59,780 --> 00:21:03,790 As luck would have it, the sea that would one day grow into 220 00:21:03,890 --> 00:21:07,860 earth as we know it, found its place at the perfect distance 221 00:21:07,960 --> 00:21:11,330 from the sun, what we now call the Goldilocks zone. 222 00:21:12,830 --> 00:21:14,400 Not too hot, not too cold. 223 00:21:20,310 --> 00:21:22,840 The solar system is vast. 224 00:21:24,640 --> 00:21:27,280 Earth could have easily wound up somewhere where every drop 225 00:21:27,380 --> 00:21:30,180 of water either froze up or boiled away. 226 00:21:32,350 --> 00:21:36,050 But here it's solid, gas and liquid all the time. 227 00:21:37,490 --> 00:21:41,420 It only takes a tiny change like a sunrise for things to 228 00:21:41,530 --> 00:21:43,760 get a little bit slippery. 229 00:21:54,340 --> 00:21:59,880 ♪ ♪ 230 00:22:09,690 --> 00:22:15,290 ♪ ♪ 231 00:22:25,300 --> 00:22:31,610 ♪ ♪ 232 00:22:41,050 --> 00:22:47,290 ♪ ♪ 233 00:22:55,970 --> 00:22:59,800 ♪ ♪ 234 00:23:49,850 --> 00:23:53,360 Solid, liquid, gas. 235 00:23:55,630 --> 00:23:58,290 Earth's water, it's a shape shifter, 236 00:23:58,900 --> 00:24:03,030 constantly changing forms and as it moves from snow to sea, 237 00:24:04,070 --> 00:24:07,900 from stream to steam it helps make the weather that 238 00:24:08,010 --> 00:24:10,870 keeps this planet a paradise for life. 239 00:24:15,850 --> 00:24:18,250 From space you can see clouds at the tops of the 240 00:24:18,350 --> 00:24:22,890 Amazon Basin but you can also see them evaporating on the 241 00:24:22,990 --> 00:24:26,260 oceans and so these systems are all interconnected. 242 00:24:28,190 --> 00:24:32,530 That natural, seemingly inevitable process 243 00:24:33,200 --> 00:24:35,830 of turning the oceans into rain, 244 00:24:35,930 --> 00:24:38,730 it's the very essence of life itself on earth. 245 00:24:40,370 --> 00:24:44,470 Without it they'd be no rivers, no ground water, 246 00:24:44,580 --> 00:24:46,810 no plants, no animals. 247 00:24:46,910 --> 00:24:49,610 The continents would be dead. 248 00:24:51,120 --> 00:24:55,420 It actually surprised me how dynamic the planet is, 249 00:24:55,520 --> 00:24:59,460 clouds whirling, lightning storms propagating over the surface, 250 00:24:59,920 --> 00:25:03,630 the ocean currents visible and you realize this 251 00:25:03,730 --> 00:25:06,930 thing is not a dead rock down there, this thing is alive. 252 00:25:11,570 --> 00:25:15,170 So we can thank our lucky stars I suppose that the 253 00:25:15,270 --> 00:25:19,480 seed that started earth was in the right place for water to 254 00:25:19,580 --> 00:25:21,880 exist in its three states. 255 00:25:25,920 --> 00:25:29,120 Our planet was born out of cosmic dust then 256 00:25:29,220 --> 00:25:31,990 watered by a storm from above, 257 00:25:32,790 --> 00:25:36,990 but all those blows were nothing compared to one that literally 258 00:25:37,100 --> 00:25:39,000 ripped the earth apart. 259 00:25:43,970 --> 00:25:48,140 You see earth had a twin. 260 00:25:48,740 --> 00:25:51,310 A twin that threatened our existence. 261 00:26:01,670 --> 00:26:05,240 The earth is the result of many, 262 00:26:05,340 --> 00:26:10,240 many collisions but the most violent collision of all was 263 00:26:10,350 --> 00:26:13,350 unknown to humankind, unknown that is, 264 00:26:14,820 --> 00:26:17,020 until we went to the moon. 265 00:26:28,060 --> 00:26:30,560 I have really vivid memories of our 266 00:26:30,670 --> 00:26:32,430 first moon landing. 267 00:26:33,940 --> 00:26:36,170 Sitting in front of the black and white TV, 268 00:26:36,270 --> 00:26:39,540 for some reason I remember having a grilled cheese sandwich, who knows? 269 00:26:42,540 --> 00:26:45,750 We thought, how could there possibly be anything in common 270 00:26:45,850 --> 00:26:49,320 between the earth and all its beautiful earthly colors and 271 00:26:49,420 --> 00:26:51,080 the grey of the moon. 272 00:26:51,190 --> 00:26:53,320 Oh that looks beautiful from here Neil. 273 00:26:53,420 --> 00:26:55,150 This cratered surface. 274 00:26:55,260 --> 00:26:58,520 It's different but it's very pretty out here. 275 00:26:59,390 --> 00:27:02,830 What we found surprised us, moon rock and earth rock had 276 00:27:02,930 --> 00:27:04,600 striking similarities. 277 00:27:04,700 --> 00:27:06,000 We'd like you to press on. 278 00:27:06,100 --> 00:27:07,670 Yeah right. 279 00:27:07,770 --> 00:27:10,440 Suggesting that both the earth and the moon had somehow 280 00:27:10,540 --> 00:27:12,100 originated from the same place. 281 00:27:12,210 --> 00:27:14,470 It's one small step for man... 282 00:27:14,740 --> 00:27:16,680 Well there's only a handful of ways that could 283 00:27:16,780 --> 00:27:19,580 have happened and none of 'em are pretty. 284 00:27:28,460 --> 00:27:30,690 The prominent theory is that there was something 285 00:27:30,790 --> 00:27:33,260 else in the Goldilocks zone. 286 00:27:34,160 --> 00:27:36,860 Another planet called Theia and it was on an 287 00:27:36,970 --> 00:27:39,470 intersecting orbit with earth. 288 00:27:43,470 --> 00:27:47,570 In space when two things are in an intersecting orbit, 289 00:27:47,680 --> 00:27:51,280 with enough time, it's inevitable that those 290 00:27:51,380 --> 00:27:53,450 two things will collide. 291 00:28:04,860 --> 00:28:08,260 Both planets became molten on impact. 292 00:28:08,360 --> 00:28:12,200 We have debris thrown out into space. 293 00:28:14,640 --> 00:28:17,500 When this cloud of debris eventually cools, 294 00:28:17,610 --> 00:28:22,140 it condenses into a new cosmic partnership. 295 00:28:23,210 --> 00:28:27,680 Planet earth and a uniquely large moon. 296 00:28:39,230 --> 00:28:43,030 Our moon was ripped right out of us, 297 00:28:43,130 --> 00:28:44,460 because of that, 298 00:28:44,570 --> 00:28:48,100 it's big and close and has a lot of pull, 299 00:28:48,640 --> 00:28:52,910 pulls the sea in, pulls the sea out, tides, simple right? 300 00:28:55,840 --> 00:28:58,950 But things get harder when that same sea is 301 00:28:59,050 --> 00:29:01,880 covered by ice. 302 00:29:13,490 --> 00:29:19,100 Which is something that grandads know and modern kids 303 00:29:19,930 --> 00:29:22,440 could stand to learn. 304 00:29:32,280 --> 00:29:38,180 ♪ ♪ 305 00:31:16,120 --> 00:31:18,920 Lukasi knows when the moon is full, 306 00:31:19,020 --> 00:31:23,120 the tide is strongest and he'll have a few more minutes 307 00:31:23,220 --> 00:31:26,360 under the ice, the best chance to grab their catch. 308 00:32:24,050 --> 00:32:25,950 We shouldn't underestimate how influential 309 00:32:26,050 --> 00:32:27,620 the moon is in all of our lives. 310 00:32:27,720 --> 00:32:30,420 Those regular tides also help give us another kind of 311 00:32:30,530 --> 00:32:33,560 rhythm, one you might assume had been with us all along. 312 00:32:41,070 --> 00:32:44,370 The collision that ended up forming the moon sent the 313 00:32:44,470 --> 00:32:47,310 earth just spinning. 314 00:32:48,380 --> 00:32:51,910 A day back then was just five hours long. 315 00:32:56,580 --> 00:32:58,980 It was the drag of the tides that eventually slowed the 316 00:32:59,090 --> 00:33:02,350 earth down to where a day became 24 hours, 317 00:33:02,460 --> 00:33:06,960 like we know now. 318 00:33:16,640 --> 00:33:22,580 ♪ ♪ 319 00:33:24,850 --> 00:33:28,510 The 24-hour day; waking up, having breakfast, 320 00:33:29,520 --> 00:33:32,380 working eight hours. 321 00:33:32,490 --> 00:33:36,020 Making dinner, day in, day out. 322 00:33:37,260 --> 00:33:40,030 These cycles, they're embedded in our DNA. 323 00:33:44,170 --> 00:33:46,570 The violent whack that gave us our moon, 324 00:33:46,670 --> 00:33:49,870 our tides and our 24-hour day, 325 00:33:49,970 --> 00:33:52,270 it gave us one more thing too; 326 00:33:52,370 --> 00:33:54,310 summer in Philadelphia. 327 00:34:00,910 --> 00:34:03,350 ♪ ♪ 328 00:34:03,450 --> 00:34:04,920 When I think of the space station, 329 00:34:05,020 --> 00:34:08,090 I think of this, like, beautiful masterpiece in space, 330 00:34:08,190 --> 00:34:10,790 just hanging there. 331 00:34:12,120 --> 00:34:14,490 The ultimate engineering challenge was, 332 00:34:14,590 --> 00:34:17,900 how do ya make your spaceship as much like earth as possible? 333 00:34:22,440 --> 00:34:25,300 Crossing the hatch from the space shuttle into the space 334 00:34:25,400 --> 00:34:27,340 station the first time. 335 00:34:27,440 --> 00:34:29,670 I remember thinking, wow, it's not the neatest 336 00:34:29,780 --> 00:34:32,340 place I've ever seen. 337 00:34:32,450 --> 00:34:36,610 There was wires and cables and computers and equipment all 338 00:34:36,720 --> 00:34:38,950 strung along these walls. 339 00:34:41,790 --> 00:34:45,320 The way we live there is, we've essentially mimicked 340 00:34:45,420 --> 00:34:48,730 what we have naturally occurring on our planet. 341 00:34:50,100 --> 00:34:53,260 We have to generate the oxygen to breathe. 342 00:34:53,930 --> 00:34:56,470 We have to generate the electricity to power all of 343 00:34:56,570 --> 00:34:57,670 our systems. 344 00:34:57,770 --> 00:34:59,840 We have to figure out a way to clean the air, 345 00:34:59,940 --> 00:35:02,810 so we can continue to breathe. 346 00:35:04,180 --> 00:35:07,340 Because we're human beings and can only live comfortably 347 00:35:07,450 --> 00:35:09,950 really within a certain temperature range, 348 00:35:10,050 --> 00:35:12,820 the whole space station, all of the systems are working 349 00:35:12,920 --> 00:35:16,250 really hard to maintain that environment for us. 350 00:35:19,460 --> 00:35:21,990 And then you look down at earth and you realize that's 351 00:35:22,090 --> 00:35:25,930 exactly what nature is doing, just on a mind-blowing scale. 352 00:35:35,110 --> 00:35:38,840 And we've got that cosmic collision that made our moon 353 00:35:39,380 --> 00:35:42,010 to thank for it. 354 00:35:42,110 --> 00:35:43,810 Wow. 355 00:35:44,120 --> 00:35:47,080 That collision between earth and Theia was so violent 356 00:35:47,190 --> 00:35:50,320 that it actually knocked earth off its axis. 357 00:35:52,060 --> 00:35:54,060 There you go. 358 00:35:56,560 --> 00:36:00,200 So let's just pretend, this is our sun and this is 359 00:36:00,500 --> 00:36:04,030 our earth and our earth is titled, due to that collision, 360 00:36:05,140 --> 00:36:08,540 titled 23 and a half degrees. 361 00:36:13,010 --> 00:36:15,880 For six months of the year the northern hemisphere is 362 00:36:15,980 --> 00:36:19,080 favoring the sun and for six months of the year, 363 00:36:19,190 --> 00:36:23,420 the southern hemisphere is favoring the sun. 364 00:36:25,420 --> 00:36:28,730 The shift in the sun's energy from north to south throughout 365 00:36:28,830 --> 00:36:32,430 the year is constantly trying to move the hot areas to the 366 00:36:32,530 --> 00:36:37,000 cold areas and the cold areas to the hot areas. 367 00:36:42,540 --> 00:36:45,880 This tilt of the earth results in our seasons. 368 00:36:51,780 --> 00:36:54,690 The seasons constantly change in shape and contour 369 00:36:54,790 --> 00:36:57,290 the land underneath. 370 00:36:58,090 --> 00:37:01,090 The world is constantly adjusting itself. 371 00:37:03,300 --> 00:37:05,260 From the vantage point of space you can see the 372 00:37:05,360 --> 00:37:09,930 ever-changing planet through the seasons from snowcapped 373 00:37:10,040 --> 00:37:12,570 mountains to desert plains. 374 00:37:13,540 --> 00:37:15,640 I really never thought of this until just very 375 00:37:15,740 --> 00:37:19,110 recently you know, I'm seeing all the seasons at once, 376 00:37:19,210 --> 00:37:21,850 so I'm seeing the winter in the northern hemisphere and 377 00:37:21,950 --> 00:37:24,920 it's summer in the southern hemisphere. 378 00:37:26,620 --> 00:37:29,320 If we had no tilt, nearly half the planet could 379 00:37:29,420 --> 00:37:32,060 be frozen all year round. 380 00:37:32,490 --> 00:37:36,230 Nicole would be fine in Florida nearer the equator but 381 00:37:36,330 --> 00:37:39,030 growing up in Philly, there'd be a glacier in my backyard. 382 00:37:48,610 --> 00:37:50,240 ♪ ♪ 383 00:37:50,340 --> 00:37:52,910 Because of our tilt, there really are few places on 384 00:37:53,010 --> 00:37:56,580 this planet where life can't thrive. 385 00:38:06,130 --> 00:38:11,660 ♪ ♪ 386 00:38:18,670 --> 00:38:23,170 Life on our planet has synchronized with our seasons. 387 00:38:24,640 --> 00:38:28,710 Raising its young in the spring and readying 388 00:38:28,810 --> 00:38:31,820 them for winter. 389 00:38:41,790 --> 00:38:47,130 ♪ ♪ 390 00:38:48,630 --> 00:38:50,930 Four and a half billion years ago we started 391 00:38:51,040 --> 00:38:54,400 with a smash that created a tilt that made our seasons, 392 00:38:55,210 --> 00:38:57,910 that gave us the rhythms of existence. 393 00:38:59,080 --> 00:39:01,650 But more than that, it gave us the diversity of 394 00:39:01,750 --> 00:39:03,750 life we see around us. 395 00:40:05,610 --> 00:40:09,050 Hard to imagine but for most of the year, 396 00:40:09,650 --> 00:40:12,980 not a single one of these bats lives here. 397 00:40:13,720 --> 00:40:17,220 All ten million arrive from across Africa, 398 00:40:17,320 --> 00:40:21,390 chasing the rains, to gorge on ripening fruits. 399 00:41:26,230 --> 00:41:30,460 These bats are essentially a flying forest 400 00:41:30,560 --> 00:41:32,660 delivery system. 401 00:41:40,210 --> 00:41:44,070 The tilt of the earth means cold moves to hot and hot to cold, 402 00:41:45,880 --> 00:41:48,310 means winter gives way to spring just as summer 403 00:41:48,410 --> 00:41:50,880 yields to fall. 404 00:41:50,980 --> 00:41:54,150 It means bats fly across a continent seeding 405 00:41:54,250 --> 00:41:56,820 forests as they go. 406 00:41:58,490 --> 00:42:04,700 The world is connected in 1,000 ways and all because of one massive whack. 407 00:42:06,000 --> 00:42:08,830 So is the danger all the in past or is the 408 00:42:08,930 --> 00:42:11,100 calm before another storm? 409 00:42:16,970 --> 00:42:21,210 ♪ ♪ 410 00:42:28,950 --> 00:42:31,220 This planet is only here because we've 411 00:42:31,320 --> 00:42:34,490 weathered just enough body blows to build our world. 412 00:42:35,990 --> 00:42:40,260 So far it's been a perfect storm that's made our perfect home, 413 00:42:40,360 --> 00:42:44,730 one that feels stable, safe, reliable. 414 00:42:44,830 --> 00:42:46,830 It isn't. 415 00:42:49,140 --> 00:42:51,170 Imagine yourself on a boat. 416 00:42:56,140 --> 00:42:58,540 Out in the middle of the ocean. 417 00:43:00,850 --> 00:43:03,220 In the middle of a storm. 418 00:43:07,390 --> 00:43:10,020 A big storm. 419 00:43:19,200 --> 00:43:21,900 It's very real to you. 420 00:43:24,710 --> 00:43:27,770 It might even be a little bit scary. 421 00:43:38,790 --> 00:43:43,160 But if you had the opportunity to just zoom in on one of 422 00:43:43,260 --> 00:43:48,390 these tiny little droplets and see that inside that little 423 00:43:49,360 --> 00:43:53,770 droplet are these tiny little micro-organisms that are just 424 00:43:53,870 --> 00:43:55,970 oblivious to this storm going on around them. 425 00:44:04,710 --> 00:44:07,650 And if we look at our earth, if we look at where we live, 426 00:44:07,750 --> 00:44:09,810 this planet that's out in space, 427 00:44:12,950 --> 00:44:17,190 we in some ways go about our daily lives oblivious to all 428 00:44:17,290 --> 00:44:20,930 the action that's going on around us, in space, 429 00:44:23,000 --> 00:44:25,900 in the solar system, in the universe. 430 00:44:29,470 --> 00:44:34,410 This cosmic storm that actually has a violent nature to it, 431 00:44:34,510 --> 00:44:36,340 is the reason why we're here. 432 00:44:36,440 --> 00:44:39,440 The reason why we're able to live so comfortably 433 00:44:39,550 --> 00:44:42,010 on this planet. 434 00:44:47,120 --> 00:44:50,060 Before flying in space I tried really hard to learn 435 00:44:50,160 --> 00:44:52,320 from the people who had flown before me, 436 00:44:53,130 --> 00:44:56,600 to get some idea of what the experience meant to them. 437 00:44:59,470 --> 00:45:02,800 These astronauts had seen the whole earth from space. 438 00:45:04,540 --> 00:45:08,570 While they described it as a really incredibly beautiful place, 439 00:45:08,680 --> 00:45:10,440 there were also some that said, 440 00:45:10,540 --> 00:45:14,350 they felt a sense of insignificance. 441 00:45:17,120 --> 00:45:20,290 From the very first time I looked out the window, 442 00:45:20,390 --> 00:45:22,820 I felt like this is significant. 443 00:45:30,200 --> 00:45:33,630 The significance of it to me is how something so 444 00:45:33,730 --> 00:45:36,970 overwhelmingly beautiful could have come from chaos, 445 00:45:37,070 --> 00:45:39,800 violence and collisions. 446 00:45:42,340 --> 00:45:46,650 It's just amazing to think about this fine line, this, 447 00:45:46,750 --> 00:45:50,050 this balance between being here surviving, 448 00:45:50,150 --> 00:45:53,390 thriving and not. 449 00:46:01,260 --> 00:46:04,760 The storm has not been our enemy. 450 00:46:06,700 --> 00:46:09,770 We aren't here in spite of it. 451 00:46:12,240 --> 00:46:14,440 We're here because of it. 452 00:46:21,550 --> 00:46:24,020 And when the storm blows over, 453 00:46:24,120 --> 00:46:26,250 it's anything but blue skies and rainbows. 454 00:46:28,460 --> 00:46:31,090 Next time... 455 00:46:33,030 --> 00:46:35,590 Here comes the sun. 456 00:46:36,030 --> 00:46:40,900 It is the fuel of life, but it is not our friend. 457 00:46:44,600 --> 00:46:47,540 The sun is a planet killer. 458 00:47:02,620 --> 00:47:04,660 Captioned by Cotter Captioning Services. 36276

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