WEBVTT 00:00:00.605 --> 00:00:01.265 Supported By 00:00:01.265 --> 00:00:02.796 Supported By Protocol Labs 00:00:02.796 --> 00:00:03.676 Supported By Protocol Labs Follow your curiosity. 00:00:03.676 --> 00:00:08.144 Supported By Protocol Labs Follow your curiosity. Lead humanity forward. 00:00:09.198 --> 00:00:12.500 Two possibilities exist: 00:00:12.500 --> 00:00:15.318 Two possibilities exist: either we are alone in the universe, 00:00:15.318 --> 00:00:18.728 Two possibilities exist: either we are alone in the universe, or we are not. 00:00:18.728 --> 00:00:23.111 Two possibilities exist: either we are alone in the universe, or we are not. Both are equally terrifying. 00:00:23.111 --> 00:00:26.498 Two possibilities exist: either we are alone in the universe, or we are not. Both are equally terrifying. Arthur C. Clarke 00:00:26.498 --> 00:00:28.163 Two possibilities exist: either we are alone in the universe, or we are not. Both are equally terrifying. Arthur C. Clarke In all of time, 00:00:28.163 --> 00:00:29.157 In all of time, 00:00:31.766 --> 00:00:35.486 on all the planets of all the galaxies in space. 00:00:39.246 --> 00:00:41.101 what civilizations have risen, 00:00:44.246 --> 00:00:45.356 looked into the night, 00:00:49.961 --> 00:00:51.936 seen what we see, 00:00:56.493 --> 00:01:00.613 asked the questions that we ask? 00:01:00.882 --> 00:01:04.742 line:1 "Are we alone?" 00:01:10.646 --> 00:01:13.443 line:1 "Is Earth the only chapter in the story of life?" 00:01:19.468 --> 00:01:22.194 line:1 "The answers lie somewhere in distant space - and distant time." 00:01:27.828 --> 00:01:30.721 line:1 "For the first time, the truth is finally within our reach." 00:01:40.929 --> 00:01:43.719 line:1 "The search will reveal who we are" 00:01:45.434 --> 00:01:48.554 line:1 "and who we might become." 00:01:54.699 --> 00:01:55.699 LIFE 00:01:55.699 --> 00:01:59.799 LIFE BEYOND 00:02:02.444 --> 00:02:03.812 CHAPTER I 00:02:03.812 --> 00:02:08.557 CHAPTER I The Dawn 00:02:11.436 --> 00:02:17.596 line:1 "In the search for life out there, we must first look inward." 00:02:24.254 --> 00:02:28.484 What we see around us is staggering complexity. 00:02:33.961 --> 00:02:36.234 How is it possible? 00:02:36.870 --> 00:02:41.270 "What does it take to create life?" 00:02:41.270 --> 00:02:42.683 "What does it take to create life?" Living organisms are created by chemistry. 00:02:42.683 --> 00:02:43.743 Living organisms are created by chemistry. 00:02:45.528 --> 00:02:48.498 We are huge packages of chemicals. 00:02:50.953 --> 00:02:53.763 And what are the ideal conditions for chemistry? 00:02:54.242 --> 00:02:55.004 Well, first, you need energy. 00:02:55.004 --> 00:02:55.129 I Well, first, you need energy. 00:02:55.129 --> 00:02:55.254 I E Well, first, you need energy. 00:02:55.254 --> 00:02:55.379 I EN Well, first, you need energy. 00:02:55.379 --> 00:02:55.504 I ENE Well, first, you need energy. 00:02:55.504 --> 00:02:55.629 I ENER Well, first, you need energy. 00:02:55.629 --> 00:02:55.754 I ENERG Well, first, you need energy. 00:02:55.754 --> 00:02:56.004 I ENERGY Well, first, you need energy. 00:02:56.004 --> 00:02:56.254 I ENERGY e.g Well, first, you need energy. 00:02:56.254 --> 00:02:56.592 I ENERGY e.g Sunlight, Well, first, you need energy. 00:02:56.592 --> 00:02:56.717 I ENERGY e.g Sunlight, 00:02:56.717 --> 00:03:00.004 I ENERGY e.g Sunlight, Geothermal Heat 00:03:00.004 --> 00:03:00.066 I ENERG e.g Sunlight, Geothermal Heat 00:03:00.066 --> 00:03:00.129 I ENER e.g Sunlight, Geothermal Heat 00:03:00.129 --> 00:03:00.191 I ENE e.g Sunlight, Geothermal Heat 00:03:00.191 --> 00:03:00.254 I EN e.g Sunlight, 00:03:00.254 --> 00:03:00.316 I E e.g 00:03:00.316 --> 00:03:00.379 I E 00:03:00.379 --> 00:03:00.629 I 00:03:01.512 --> 00:03:03.262 But not too much. 00:03:03.971 --> 00:03:05.741 What you want is just the right amount 00:03:05.741 --> 00:03:07.461 and planets it turns out are just right, 00:03:07.545 --> 00:03:08.826 because they are close to stars, 00:03:08.826 --> 00:03:10.164 but not too close. 00:03:13.255 --> 00:03:14.305 You also need a great diversity 00:03:14.305 --> 00:03:14.555 II You also need a great diversity 00:03:14.555 --> 00:03:14.586 II HE You also need a great diversity 00:03:14.586 --> 00:03:14.601 II HEA You also need a great diversity 00:03:14.601 --> 00:03:14.617 II HEAV You also need a great diversity 00:03:14.617 --> 00:03:14.664 II HEAVY You also need a great diversity 00:03:14.664 --> 00:03:14.687 II HEAVY E You also need a great diversity 00:03:14.687 --> 00:03:14.699 II HEAVY EL You also need a great diversity 00:03:14.699 --> 00:03:14.711 II HEAVY ELE You also need a great diversity 00:03:14.711 --> 00:03:14.758 II HEAVY ELEM You also need a great diversity 00:03:14.758 --> 00:03:14.781 II HEAVY ELEME You also need a great diversity 00:03:14.781 --> 00:03:14.793 II HEAVY ELEMEN You also need a great diversity 00:03:14.793 --> 00:03:14.805 II HEAVY ELEMENT You also need a great diversity 00:03:14.805 --> 00:03:15.505 II HEAVY ELEMENTS You also need a great diversity 00:03:15.505 --> 00:03:15.630 II HEAVY ELEMENTS e.g of chemical elements. 00:03:15.630 --> 00:03:15.965 II HEAVY ELEMENTS e.g Oxygen, of chemical elements. 00:03:15.965 --> 00:03:16.388 II HEAVY ELEMENTS e.g Oxygen, Carbon, of chemical elements. 00:03:16.388 --> 00:03:17.021 II HEAVY ELEMENTS e.g Oxygen, Carbon, Sulfur of chemical elements. 00:03:17.021 --> 00:03:20.372 II HEAVY ELEMENTS e.g Oxygen, Carbon, Sulfur 00:03:20.372 --> 00:03:20.403 II HEAVY ELEMENT e.g Oxygen, Carbon, Sulfur 00:03:20.403 --> 00:03:20.434 II HEAVY ELEMEN e.g Oxygen, Carbon, Sulfur 00:03:20.434 --> 00:03:20.465 II HEAVY ELEME e.g Oxygen, Carbon, 00:03:20.465 --> 00:03:20.497 II HEAVY ELEM e.g Oxygen, Carbon, 00:03:20.497 --> 00:03:20.528 II HEAVY ELE e.g Oxygen, Carbon, 00:03:20.528 --> 00:03:20.559 II HEAVY EL e.g Oxygen, 00:03:20.559 --> 00:03:20.590 II HEAVY E e.g 00:03:20.590 --> 00:03:20.622 II HEAVY 00:03:20.622 --> 00:03:20.662 II HEAV 00:03:20.662 --> 00:03:20.703 II HEA 00:03:20.703 --> 00:03:20.743 II HE 00:03:20.743 --> 00:03:20.784 II H 00:03:20.784 --> 00:03:20.865 II 00:03:20.865 --> 00:03:20.946 I 00:03:20.987 --> 00:03:22.772 And you need liquid, 00:03:22.772 --> 00:03:22.833 such as water. 00:03:22.833 --> 00:03:22.896 III such as water. 00:03:22.896 --> 00:03:22.958 III L such as water. 00:03:22.958 --> 00:03:23.020 III LI such as water. 00:03:23.020 --> 00:03:23.083 III LIQ such as water. 00:03:23.083 --> 00:03:23.208 III LIQU such as water. 00:03:23.208 --> 00:03:23.315 III LIQUI such as water. 00:03:23.315 --> 00:03:23.422 III LIQUID such as water. 00:03:23.422 --> 00:03:23.529 III LIQUID such as water. 00:03:23.529 --> 00:03:23.779 III LIQUID e.g such as water. 00:03:23.779 --> 00:03:24.195 III LIQUID e.g Water such as water. 00:03:24.195 --> 00:03:27.824 III LIQUID e.g. water 00:03:28.134 --> 00:03:29.164 Why? 00:03:29.266 --> 00:03:30.620 Well, in gases, 00:03:31.340 --> 00:03:33.621 atoms move past each other so fast 00:03:33.621 --> 00:03:35.760 that they can't hitch up. 00:03:36.242 --> 00:03:39.492 In solids, atoms are stuck together. 00:03:39.492 --> 00:03:40.628 They can't move. 00:03:41.479 --> 00:03:42.748 In liquids, 00:03:43.957 --> 00:03:46.767 they can cruise and cuddle 00:03:46.847 --> 00:03:49.973 and link up to form molecules. 00:03:56.526 --> 00:04:00.936 Liquid water is just so good for getting evolution going. 00:04:00.936 --> 00:04:02.644 Molecules can dissolve in the water 00:04:02.644 --> 00:04:05.504 to form more complex chains. 00:04:06.262 --> 00:04:08.758 Now, where do you find such goldilocks conditions? 00:04:09.111 --> 00:04:11.231 Well, planets are great, 00:04:11.960 --> 00:04:16.170 and our early Earth was almost perfect. 00:04:17.949 --> 00:04:18.336 Earth 00:04:18.336 --> 00:04:24.326 Earth 4 Billion Years Ago 00:04:25.488 --> 00:04:26.598 It was just the right distance 00:04:26.598 --> 00:04:29.734 from its star to contain huge oceans of liquid water. 00:04:33.504 --> 00:04:35.226 And deep beneath those oceans, 00:04:35.226 --> 00:04:36.664 at cracks in the Earth's crust, 00:04:38.243 --> 00:04:40.239 fantastic chemistry began to happen 00:04:40.289 --> 00:04:43.503 atoms combined in all sorts of exotic combinations. 00:05:01.965 --> 00:05:09.425 line:1 "The exact recipe is still a mystery, but the ingredients for life are simple - energy, organic molecules, and liquid water." 00:05:30.406 --> 00:05:37.846 line:1 "Somewhere in the seas of early Earth, basic chemistry became biology - perhaps even more than once." 00:05:43.415 --> 00:05:50.075 line:1 "The first cells were likely born in hot volcanic waters, in conditions once thought impossible for biology." 00:05:52.198 --> 00:05:59.188 "The closer we study life, the more extreme places we find it thriving." 00:05:59.188 --> 00:05:59.898 "The closer we study life, the more extreme places we find it thriving." Here on our planet, 00:05:59.898 --> 00:06:01.238 Here on our planet, 00:06:01.324 --> 00:06:02.754 microbes have adapted 00:06:02.754 --> 00:06:06.254 to survive the most hostile conditions. 00:06:07.960 --> 00:06:09.390 Arid deserts, 00:06:09.464 --> 00:06:11.504 the frozen Himalayas, 00:06:12.734 --> 00:06:16.494 in trenches under thousands of tons of pressure 00:06:16.613 --> 00:06:18.953 in the ocean deeps. 00:06:21.237 --> 00:06:24.507 In the vacuum of a space simulator, 00:06:24.597 --> 00:06:28.617 life forms have been flourishing for years 00:06:28.972 --> 00:06:33.312 without oxygen. 00:06:33.886 --> 00:06:40.136 line:1 "New research suggests that life emerged over 4 billion years ago, when Earth was an alien and deadly place." 00:06:44.108 --> 00:06:50.488 line:1 "The planet was ravaged by intense volcanism and an asteroid storm that lasted 100 million years." 00:07:04.514 --> 00:07:09.914 "Yet even in these extreme conditions, life quickly found a foothold." 00:07:09.914 --> 00:07:11.149 "Yet even in these extreme conditions, life quickly found a foothold." Very very quickly, 00:07:11.149 --> 00:07:12.473 Very very quickly, 00:07:12.473 --> 00:07:15.783 as soon as the Earth cooled off after its formation, 00:07:15.873 --> 00:07:20.953 we know that life began here. 00:07:22.508 --> 00:07:25.228 Because it happened quickly here on Earth, 00:07:25.278 --> 00:07:26.798 we think it is going to happen quickly 00:07:26.798 --> 00:07:28.948 on other planets as well. 00:07:39.664 --> 00:07:46.611 line:1 "The story of Earth gives us hope that life could be universally common." 00:07:48.399 --> 00:07:54.870 line:1 "It teaches us that life is fast acting, tenacious, and made of basic, common ingredients." 00:07:57.971 --> 00:08:05.961 line:1 "After 4 billion years of isolation, the search for our cosmic kin has finally begun." 00:08:10.261 --> 00:08:17.401 line:1 "Where there is water, there is life - and so our best chance is to look for ocean worlds like Earth." 00:08:20.577 --> 00:08:27.917 line:1 "Our search for Earth-like planets has only just begun, and the findings are tantalizing." 00:08:29.866 --> 00:08:30.696 KEPLER-62F 00:08:30.696 --> 00:08:30.946 KEPLER-62F Distance: 1200 Light Years. 00:08:30.946 --> 00:08:31.071 KEPLER-62F Distance: 1200 Light Years. Size: 1.4x Earth. 00:08:31.071 --> 00:08:31.196 KEPLER-62F Distance: 1200 Light Years. Size: 1.4x Earth. Temperature: ≥ -85ºF. 00:08:31.196 --> 00:08:31.350 KEPLER-62F Distance: 1200 Light Years. Size: 1.4x Earth. Temperature: ≥ -85ºF. Age: ~7 billion years. 00:08:31.350 --> 00:08:36.840 KEPLER-62F Distance: 1200 Light Years. Size: 1.4x Earth. Temperature: ≥ -85ºF. Age: ~7 billion years. Possible Water World 00:08:36.840 --> 00:08:37.090 KEPLER-62F Distance: 1200 Light Years. Size: 1.4x Earth. Temperature: ≥ -85ºF. Age: ~7 billion years. 00:08:37.090 --> 00:08:37.340 KEPLER-62F Distance: 1200 Light Years. Size: 1.4x Earth. Temperature: ≥ -85ºF. 00:08:37.340 --> 00:08:37.465 KEPLER-62F Distance: 1200 Light Years. Size: 1.4x Earth. 00:08:37.465 --> 00:08:37.527 KEPLER-62F Distance: 1200 Light Years. 00:08:37.527 --> 00:08:37.590 KEPLER-62F 00:08:38.833 --> 00:08:39.566 TRAPPIST-1D 00:08:39.566 --> 00:08:39.816 TRAPPIST-1D Distance: 41 Light Years. 00:08:39.816 --> 00:08:39.925 TRAPPIST-1D Distance: 41 Light Years. Size: 0.77x Earth. 00:08:39.925 --> 00:08:40.034 TRAPPIST-1D Distance: 41 Light Years. Size: 0.77x Earth. Age: ~7.5 billion years. 00:08:40.034 --> 00:08:40.143 TRAPPIST-1D Distance: 41 Light Years. Size: 0.77x Earth. Age: ~7.5 billion years. Temperature: ≥ 20ºF. 00:08:40.143 --> 00:08:46.568 TRAPPIST-1D Distance: 41 Light Years. Size: 0.77x Earth. Age: ~7.5 billion years. Temperature: ≥ 20ºF. Possible Water World 00:08:46.568 --> 00:08:46.818 TRAPPIST-1D Distance: 41 Light Years. Size: 0.77x Earth. Age: ~7.5 billion years. Temperature: ≥ 20ºF. 00:08:46.818 --> 00:08:46.943 TRAPPIST-1D Distance: 41 Light Years. Size: 0.77x Earth. Age: ~7.5 billion years. 00:08:46.943 --> 00:08:47.068 TRAPPIST-1D Distance: 41 Light Years. Size: 0.77x Earth. 00:08:47.068 --> 00:08:47.204 TRAPPIST-1D Distance: 41 Light Years. 00:08:47.204 --> 00:08:47.341 TRAPPIST-1D 00:08:48.973 --> 00:08:49.747 TEEGARDEN-B 00:08:49.747 --> 00:08:49.997 TEEGARDEN-B Distance: 12 Light Years. 00:08:49.997 --> 00:08:50.112 TEEGARDEN-B Distance: 12 Light Years. Size: 1.07x Earth. 00:08:50.112 --> 00:08:50.227 TEEGARDEN-B Distance: 12 Light Years. Size: 1.07x Earth. Age: 8 billion years. 00:08:50.227 --> 00:08:50.342 TEEGARDEN-B Distance: 12 Light Years. Size: 1.07x Earth. Age: 8 billion years. Minimum temperature: ≥ 20ºF. 00:08:50.342 --> 00:08:56.149 TEEGARDEN-B Distance: 12 Light Years. Size: 1.07x Earth. Age: 8 billion years. Minimum temperature: ≥ 20ºF. Possible Water World 00:08:56.149 --> 00:08:56.399 TEEGARDEN-B Distance: 12 Light Years. Size: 1.07x Earth. Age: 8 billion years. Minimum temperature: ≥ 20ºF. 00:08:56.399 --> 00:08:56.524 TEEGARDEN-B Distance: 12 Light Years. Size: 1.07x Earth. Age: 8 billion years. 00:08:56.524 --> 00:08:56.649 TEEGARDEN-B Distance: 12 Light Years. Size: 1.07x Earth. 00:08:56.649 --> 00:08:56.779 TEEGARDEN-B Distance: 12 Light Years. 00:08:56.779 --> 00:08:56.909 TEEGARDEN-B 00:08:58.908 --> 00:08:59.759 K2-18B 00:08:59.759 --> 00:09:00.009 K2-18B Distance: 111 Light Years. 00:09:00.009 --> 00:09:00.193 K2-18B Distance: 111 Light Years. Size: 2.7x Earth. 00:09:00.193 --> 00:09:00.285 K2-18B Distance: 111 Light Years. Size: 2.7x Earth. Temperature: -100 -116ºF. 00:09:00.285 --> 00:09:07.842 K2-18B Distance: 111 Light Years. Size: 2.7x Earth. Temperature: -100 -116ºF. Confirmed atmospheric water vapor 00:09:07.842 --> 00:09:08.092 K2-18B Distance: 111 Light Years. Size: 2.7x Earth. Temperature: -100 -116ºF. 00:09:08.092 --> 00:09:08.211 K2-18B Distance: 111 Light Years. Size: 2.7x Earth. 00:09:08.211 --> 00:09:08.330 K2-18B Distance: 111 Light Years. 00:09:08.330 --> 00:09:08.449 K2-18B 00:09:10.708 --> 00:09:17.858 "We have barely scratched the surface. Nature's trove of secrets is bottomless." 00:09:17.858 --> 00:09:20.086 "We have barely scratched the surface. Nature's trove of secrets is bottomless." We know that the galaxy is awash in water. 00:09:20.086 --> 00:09:20.956 We know that the galaxy is awash in water. 00:09:26.475 --> 00:09:28.965 It’s awash in organic molecules, 00:09:29.015 --> 00:09:32.965 and complex chemistry. 00:09:33.964 --> 00:09:35.504 All of the things that we know were 00:09:35.504 --> 00:09:37.944 necessary for life to begin on this planet 00:09:38.024 --> 00:09:40.734 exist on abundance throughout the galaxy. 00:09:47.259 --> 00:09:50.250 Did something similar to what happened on our own planet 00:09:50.390 --> 00:09:56.480 happen on those other planets? 00:09:59.078 --> 00:10:05.168 line:1 "Looking at the raw numbers, the existence of alien life seems almost inevitable." 00:10:12.209 --> 00:10:20.889 line:1 "The latest data suggest that up to 1/4 of stars have rocky planets orbiting in their habitable zone - the right distance for liquid water." 00:10:28.312 --> 00:10:36.419 line:1 "In our Milk Way galaxy alone, that's ~50 billion worlds like Earth." 00:10:39.331 --> 00:10:46.251 line:1 "In the entire universe, the possible number of habitable planets is staggering:" 00:10:46.251 --> 00:10:52.871 line:1 "In the entire universe, the possible number of habitable planets is staggering:" 100,000,000,000,000,000,000. 00:10:55.623 --> 00:11:00.793 line:1 "Imagine each flash of light represents an Earth-like planet." 00:11:03.428 --> 00:11:10.851 line:1 "You would have to watch this animation for over a billion years to view them all." 00:11:20.569 --> 00:11:26.939 line:1 "Each one with a history as rich and unique as Earth." 00:11:59.056 --> 00:12:04.246 line:1 "Trillions and trillions of chemical soups, stewing for eons." 00:12:05.259 --> 00:12:07.619 There are more habitable 00:12:07.619 --> 00:12:10.609 Earth-mass planets in the observable volume 00:12:10.609 --> 00:12:14.044 of the universe than there are grains of sand 00:12:14.224 --> 00:12:16.301 on all the beaches on Earth. 00:12:31.794 --> 00:12:39.620 line:1 "Among this abundance of worlds, many will be deadly to life as we know it." 00:12:43.188 --> 00:12:49.538 line:1 "There will be planets in the habitable zone that are scorched, frozen, and suffocated by poison gases." 00:12:52.123 --> 00:12:57.923 line:1 "Many will lack an atmosphere, critical for temperature regulation, or have one that is deadly." 00:13:10.690 --> 00:13:18.262 line:1 "Venus, once thought to potentially support life, is now sterilized by a crushing, toxic atmosphere." 00:13:20.195 --> 00:13:26.595 line:1 "But life may not be confined to the habitable zone." 00:13:31.003 --> 00:13:39.623 line:1 "Far from the warmth of their star, the moons of giant gas planets may be hidden oases for life." 00:13:42.695 --> 00:13:51.625 line:1 "Their energy comes not from starlight, but from gravity - the lurching push and pull of the host planet." 00:13:55.439 --> 00:14:03.809 line:1 "Icy Enceladus has it all: a huge subsurface ocean with hydrothermal vents spewing the chemistry of life." 00:14:08.224 --> 00:14:15.354 line:1 "Titan is especially alluring - larger than Mercury and speckled with methane lakes and organic compounds." 00:14:21.018 --> 00:14:28.498 line:1 "In 2026, NASA plans to send a drone to Titan, seeking out signs of life in its valleys and craters." 00:14:31.259 --> 00:14:37.159 line:1 "There may be 100 trillion exomoons in our galaxy alone - 100 times the number of planets." 00:14:38.830 --> 00:14:42.740 line:1 "Some may even be Earth sized, with atmospheres and surface water." 00:14:44.228 --> 00:14:50.186 line:1 "With so many places to find life, it seems only a matter of time before we make a discovery." 00:14:52.048 --> 00:14:55.607 line:1 "Some think we already have." 00:15:02.138 --> 00:15:09.528 line:1 "On June 30, 1976, the Viking lander on Mars found something that still remains unexplained." 00:15:13.035 --> 00:15:22.165 line:1 "After being injected with nutrients, Martian sol samples expelled signature radioactive gas - just like soils from Earth." 00:15:23.904 --> 00:15:24.029 line:1 Sterilized Soil | 00:15:24.029 --> 00:15:24.154 line:1 Sterilized Soil | Sterilized Soil | 00:15:24.154 --> 00:15:40.984 line:1 Sterilized Soil | California Soil | Martian soil 00:15:41.710 --> 00:15:49.930 line:1 "Was this signal a natural phenomenon, or our first encounter with alien biology?" 00:15:50.512 --> 00:15:53.700 The discovery of just one bacteria on Mars, 00:15:54.272 --> 00:15:56.982 or any other body of the Solar System 00:15:57.711 --> 00:16:01.230 would indicate that the whole chain of evolutions. 00:16:01.230 --> 00:16:04.740 Cosmic, chemical and biological, 00:16:05.252 --> 00:16:07.732 is at work everywhere. 00:16:08.473 --> 00:16:09.753 In that case, 00:16:09.778 --> 00:16:12.998 the creation of life anywhere in the universe 00:16:13.503 --> 00:16:17.650 would be more the rule than the exception. 00:16:20.558 --> 00:16:27.578 line:1 "If we haven't found life already, it may not be long until we do." 00:16:29.934 --> 00:16:36.514 "NASA scientists now think we are on the verge of discovery." 00:16:36.514 --> 00:16:39.061 "NASA scientists now think we are on the verge of discovery." Within all of our lifetimes we're going to understand 00:16:39.061 --> 00:16:40.607 "NASA scientists now think we are on the verge of discovery." that there is life on other bodies in the Solar System. 00:16:40.607 --> 00:16:41.377 that there is life on other bodies in the Solar System. 00:16:49.514 --> 00:16:51.570 We're going to understand the implications of that 00:16:51.570 --> 00:16:54.170 for evolution of life here on Earth. 00:16:56.274 --> 00:16:57.864 We're going to find planets around 00:16:57.864 --> 00:16:59.644 other stars that we can say 00:16:59.704 --> 00:17:03.264 we see potential signs of habitability in their atmospheres. 00:17:05.998 --> 00:17:09.108 That's all going to happen in the next 10 to 20 years. 00:17:10.008 --> 00:17:12.038 How exciting is that? 00:17:13.783 --> 00:17:15.404 We're on the verge of things that the 00:17:15.404 --> 00:17:17.452 people have wondered about for millennia: 00:17:17.452 --> 00:17:18.501 "Are we alone?" 00:17:21.004 --> 00:17:25.224 And here we are on the verge of finding that out. 00:17:29.184 --> 00:17:35.854 line:1 "If we do find life out there, what will we discover about ourselves?" 00:17:39.596 --> 00:17:46.086 line:1 "What chapter is Earth in the story of life?" 00:17:47.749 --> 00:17:51.239 The universe is nearly 14 billion years old. 00:17:52.029 --> 00:17:55.759 And our galaxy is something like 12 billion years old. 00:17:56.220 --> 00:17:58.480 So, there could be life out there 00:17:58.751 --> 00:18:01.421 that could be dramatically more advanced 00:18:01.421 --> 00:18:04.981 than the life that we have here on this planet. 00:18:06.195 --> 00:18:10.145 line:1 "Is Earth a latecomer on the cosmic stage?" 00:18:11.188 --> 00:18:14.838 line:1 "Just how ancient could life be?" 00:18:15.941 --> 00:18:16.251 100 Thousand Years Ago 00:18:16.251 --> 00:18:16.647 1 Million Years Ago 00:18:16.647 --> 00:18:16.934 5 Million Years Ago 00:18:16.934 --> 00:18:17.722 10 Million Years Ago 00:18:17.722 --> 00:18:18.497 50 Million Years Ago 00:18:18.497 --> 00:18:19.267 100 Million Years Ago 00:18:19.267 --> 00:18:19.767 200 Million Years Ago 00:18:19.767 --> 00:18:20.147 300 Million Years Ago 00:18:20.147 --> 00:18:20.457 400 Million Years Ago 00:18:20.457 --> 00:18:21.437 500 Million Years Ago 00:18:21.437 --> 00:18:22.467 1 Billion Years Ago 00:18:22.467 --> 00:18:23.127 2 Billion Years Ago 00:18:23.127 --> 00:18:23.641 3 Billion Years Ago 00:18:23.641 --> 00:18:23.956 4 Billion Years Ago 00:18:23.956 --> 00:18:25.117 5 Billion Years Ago 00:18:25.117 --> 00:18:25.553 10 Billion Years Ago 00:18:25.553 --> 00:18:26.025 13.8 Billion Years Ago 00:18:26.507 --> 00:18:26.987 Event: The Big Bang 00:18:33.670 --> 00:18:39.500 line:1 "For its first few million years, the cosmos was too hot for life as we know it." 00:18:42.562 --> 00:18:48.242 line:1 "The ambient temperature would have boiled you alive." 00:18:48.350 --> 00:18:48.790 Event: The First Star 00:19:01.614 --> 00:19:09.584 line:1 "When it was finally cool enough for life, there were no stars and planets. Only huge lumbering clouds of hydrogen." 00:19:17.657 --> 00:19:25.997 line:1 "After 70 million years, gravity took hold of these clouds and spun them into the first generation of stars." 00:19:45.105 --> 00:19:52.025 line:1 "The first stars were massive and bright, but there was no life to watch them rise." 00:19:53.891 --> 00:19:59.981 "Vital heavy elements were still being forged in their hot stellar cores. Not even the Big Bang was hot enough to create them." 00:19:59.981 --> 00:20:01.951 "Vital heavy elements were still being forged in their hot stellar cores. Not even the Big Bang was hot enoughto create them." The only elements that were created on The Big Bang were hydrogen, 00:20:01.951 --> 00:20:02.751 The only elements that were created on the Big Bang were hydrogen, 00:20:02.992 --> 00:20:05.152 helium and a little bit of lithium. 00:20:07.483 --> 00:20:09.978 All the stuff that makes your life livable 00:20:09.978 --> 00:20:13.458 those elements weren't created on the Big Bang. 00:20:15.527 --> 00:20:16.927 The only place they were created 00:20:17.005 --> 00:20:18.725 is in the fiery cores of stars 00:20:18.725 --> 00:20:21.485 and the only way they could get into your body 00:20:21.781 --> 00:20:24.311 is if the stars were kind enough to explode. 00:20:24.338 --> 00:20:24.838 Event: Death And Rebirth 00:20:37.661 --> 00:20:44.141 line:1 "The explosive death of the first mid-sized stars seeded the cosmos with the ingredients for life." 00:20:48.411 --> 00:20:55.841 line:1 "From their ashes rose a second generation of suns - this time with rocky planets dancing around them." 00:20:58.457 --> 00:21:03.697 line:1 "This is the moment: the raw ingredients for life together for the first time, ~13.7 billion years ago." 00:21:11.106 --> 00:21:17.986 line:1 "Some believe the conditions for life existed even earlier, in the warm afterglow of creation." 00:21:25.859 --> 00:21:32.400 line:1 "As the heat from the Big Bang faded, the universe passed through a goldilocks era." 00:21:38.167 --> 00:21:45.857 line:1 "Some 15 million years after time began, the ambient temperature reached a balmy 75º F (24º C)." 00:21:51.097 --> 00:21:57.367 line:1 "For millions of years, it was warm in all directions, like an endless summer day on Earth." 00:22:00.414 --> 00:22:09.104 line:1 "In theory, stars and planets could have formed this early on, in hypothesized ultra-dense regions of space." 00:22:14.834 --> 00:22:24.314 line:1 "If such regions existed, liquid water could have flowed abundantly, even on rogue planets far from any star." 00:22:29.748 --> 00:22:37.918 line:1 "Could this have been dawn of life? Alien beings feeding off the heat of the Big Bang?" 00:22:44.069 --> 00:22:49.531 line:1 "Somewhere out there may be a planet with life nearly as old as the universe itself." 00:22:52.430 --> 00:23:03.110 line:1 "With a 10 billion year head start, the universe could be teeming with life far more advanced than our own." 00:23:06.062 --> 00:23:14.883 line:1 "Despite decades of searching, no sign of alien life has ever been confirmed, intelligent or otherwise." 00:23:17.849 --> 00:23:25.089 line:1 "So where is everybody?" 00:23:28.186 --> 00:23:34.506 line:1 "Could we really be alone?" 00:23:44.579 --> 00:23:55.264 line:1 "Maybe primitive life is common, but intelligence is exceedingly rare." 00:24:04.328 --> 00:24:11.048 line:1 "Maybe space is just too vast for feasible communication." 00:24:17.705 --> 00:24:21.675 line:1 "Or maybe we are the first." 00:24:23.189 --> 00:24:30.299 line:1 "Could we be the opening chapter in a sprawling history of life?" 00:24:36.915 --> 00:24:40.188 13.8 Billion Years 00:24:40.188 --> 00:24:41.447 14 Billion Years 00:24:41.447 --> 00:24:42.528 15 Billion Years 00:24:42.528 --> 00:24:43.278 16 Billion Years 00:24:43.278 --> 00:24:43.818 17 Billion Years 00:24:43.818 --> 00:24:44.278 18 Billion Years 00:24:44.278 --> 00:24:44.658 19 Billion Years 00:24:44.658 --> 00:24:45.018 20 Billion Years "The universe is young, and the vast majority of planets have yet to be born." 00:24:45.018 --> 00:24:45.318 21 Billion Years "The universe is young, and the vast majority of planets have yet to be born." 00:24:45.318 --> 00:24:45.618 22 Billion Years "The universe is young, and the vast majority of planets have yet to be born." 00:24:45.618 --> 00:24:45.868 23 Billion Years "The universe is young, and the vast majority of planets have yet to be born." 00:24:45.868 --> 00:24:46.118 24 Billion Years "The universe is young, and the vast majority of planets have yet to be born." 00:24:46.118 --> 00:24:47.028 25 Billion Years "The universe is young, and the vast majority of planets have yet to be born." 00:24:47.028 --> 00:24:47.758 30 Billion Years "The universe is young, and the vast majority of planets have yet to be born." 00:24:47.758 --> 00:24:48.358 35 Billion Years "The universe is young, and the vast majority of planets have yet to be born." 00:24:48.358 --> 00:24:48.868 40 Billion Years "The universe is young, and the vast majority of planets have yet to be born." 00:24:48.868 --> 00:24:49.368 45 Billion Years "The universe is young, and the vast majority of planets have yet to be born." 00:24:49.368 --> 00:24:49.788 50 Billion Years "The universe is young, and the vast majority of planets have yet to be born." 00:24:49.788 --> 00:24:50.157 55 Billion Years "The universe is young, and the vast majority of planets have yet to be born." 00:24:50.157 --> 00:24:50.498 60 Billion Years "The universe is young, and the vast majority of planets have yet to be born." 00:24:50.498 --> 00:24:50.828 65 Billion Years "The universe is young, and the vast majority of planets have yet to be born." 00:24:50.828 --> 00:24:51.408 70 Billion Years "The universe is young, and the vast majority of planets have yet to be born." 00:24:51.408 --> 00:24:51.958 80 Billion Years 00:24:51.958 --> 00:24:52.478 90 Billion Years 00:24:52.478 --> 00:24:52.877 100 Billion Years 00:24:52.877 --> 00:24:53.287 110 Billion Years 00:24:53.287 --> 00:24:53.677 120 Billion Years 00:24:53.677 --> 00:24:54.007 130 Billion Years 00:24:54.007 --> 00:24:54.340 140 Billion Years 00:24:54.340 --> 00:24:55.737 150 Billion Years "The ingredients for life will be stewing for another 100,000,000,000,000 years." 00:24:55.737 --> 00:24:56.697 200 Billion Years "The ingredients for life will be stewing for another 100,000,000,000,000 years." 00:24:56.697 --> 00:24:57.458 250 Billion Years "The ingredients for life will be stewing for another 100,000,000,000,000 years." 00:24:57.458 --> 00:24:58.097 300 Billion Years "The ingredients for life will be stewing for another 100,000,000,000,000 years." 00:24:58.097 --> 00:24:58.627 350 Billion Years "The ingredients for life will be stewing for another 100,000,000,000,000 years." 00:24:58.627 --> 00:24:59.117 400 Billion Years "The ingredients for life will be stewing for another 100,000,000,000,000 years." 00:24:59.117 --> 00:24:59.533 450 Billion Years "The ingredients for life will be stewing for another 100,000,000,000,000 years." 00:24:59.533 --> 00:25:00.273 500 Billion Years "The ingredients for life will be stewing for another 100,000,000,000,000 years." 00:25:00.273 --> 00:25:00.963 600 Billion Years "The ingredients for life will be stewing for another 100,000,000,000,000 years." 00:25:00.963 --> 00:25:01.503 700 Billion Years "The ingredients for life will be stewing for another 100,000,000,000,000 years." 00:25:01.503 --> 00:25:02.334 800 Billion Years 00:25:02.334 --> 00:25:04.303 900 Billion Years 00:25:04.303 --> 00:25:04.883 900 Billion Years "From this perspective, we are the dawn: the opening melody in a symphony of life." 00:25:04.883 --> 00:25:05.133 1 Trillion Years "From this perspective, we are the dawn: the opening melody in a symphony of life." 00:25:05.133 --> 00:25:05.506 2 Trillion Years "From this perspective, we are the dawn: the opening melody in a symphony of life." 00:25:05.506 --> 00:25:06.256 4 Trillion Years "From this perspective, we are the dawn: the opening melody in a symphony of life." 00:25:06.256 --> 00:25:07.726 8 Trillion Years "From this perspective, we are the dawn: the opening melody in a symphony of life." 00:25:07.726 --> 00:25:10.376 16 Trillion Years "From this perspective, we are the dawn: the opening melody in a symphony of life." 00:25:10.376 --> 00:25:13.050 32 Trillion Years "From this perspective, we are the dawn: the opening melody in a symphony of life." 00:25:13.050 --> 00:25:14.916 32 Trillion Years 00:25:14.916 --> 00:25:15.698 64 Trillion Years 00:25:15.698 --> 00:25:17.017 70 Trillion Years 00:25:17.017 --> 00:25:18.418 80 Trillion Years 00:25:18.418 --> 00:25:19.118 90 Trillion Years 00:25:19.118 --> 00:25:19.818 95 Trillion Years 00:25:19.818 --> 00:25:20.068 ~100 Trillion Years Later 00:25:20.068 --> 00:25:23.353 Event: Last Star Dies ~100 Trillion Years Later 00:25:23.663 --> 00:25:28.423 line:1 "What might come long after us?" 00:25:37.645 --> 00:25:45.435 line:1 "Red dwarf stars can live up to 10 trillion years, bathing their planets in starlight for eons." 00:25:56.299 --> 00:26:01.149 line:1 "Life is much more probable on these time scales, where conditions are stable for vast periods of time." 00:26:10.144 --> 00:26:16.734 line:1 "Any beings living close to these stars would have to contend with violent solar flares that continually threaten extinction." 00:26:20.024 --> 00:26:30.304 line:1 "Many of these planets would be tidally locked - one side permanently exposed to the sun, the other frozen in darkness." 00:26:34.073 --> 00:26:39.993 line:1 "But as Earth has taught us, life is remarkably adaptable." 00:26:42.502 --> 00:26:49.395 line:1 "What forms might life take when it has trillions of years to evolve?" 00:27:23.932 --> 00:27:29.592 line:1 "One day, somehow, the story of life will come to an end." 00:27:32.373 --> 00:27:40.133 line:1 "If we are the first chapter of that story, we have the chance to carry the torch of life far into the future." 00:27:57.674 --> 00:28:05.824 line:1 "And if biology does persist far into the future, then we live in a privileged moment." 00:28:09.675 --> 00:28:14.895 line:1 In later chapters, the universe will seem far different. 00:28:17.924 --> 00:28:24.148 line:1 "The expansion of spacetime will make distant stars invisible, and the night skies will go dark." 00:28:26.681 --> 00:28:35.861 line:1 "Perhaps life in the far future will wonder: What it was like to live in the universe's brilliant early days?" 00:28:38.190 --> 00:28:42.710 line:1 "We are lucky enough to know the answer." 00:28:48.685 --> 00:28:53.595 line:1 "All we have to do is look up." 00:29:06.289 --> 00:29:12.007 Hand Crafted By Melodysheep 00:29:12.007 --> 00:29:15.557 Hand Crafted By Melodysheep Supported By 00:29:15.557 --> 00:29:17.647 Hand Crafted By Melodysheep Supported By Protocol Labs 00:29:17.647 --> 00:29:18.887 Supported By Protocol Labs Featuring The Voices Of 00:29:18.887 --> 00:29:19.767 Protocol Labs Featuring The Voices Of Douglas Rain 00:29:19.767 --> 00:29:20.557 Featuring The Voices Of Douglas Rain Orson Welles 00:29:20.557 --> 00:29:21.327 Douglas Rain Orson Welles David Christian 00:29:21.327 --> 00:29:22.087 Orson Welles David Christian Michelle Thaller 00:29:22.087 --> 00:29:22.887 David Christian Michelle Thaller Andrew Siemion 00:29:22.887 --> 00:29:23.647 Michelle Thaller Andrew Siemion Dan Werthimer 00:29:23.647 --> 00:29:24.347 Andrew Siemion Dan Werthimer Avi Loeb 00:29:24.347 --> 00:29:25.217 Dan Werthimer Avi Loeb Ellen Stofan 00:29:25.217 --> 00:29:26.627 Avi Loeb Ellen Stofan Lawrence Krauss 00:29:26.627 --> 00:29:27.987 Ellen Stofan Lawrence Krauss Concept, Music & Visuals By 00:29:27.987 --> 00:29:29.567 Lawrence Krauss Concept, Music & Visuals By Melodysheep / John D. Boswell 00:29:29.567 --> 00:29:30.797 Concept, Music & Visuals By Melodysheep / John D. Boswell Additional Visuals By 00:29:30.797 --> 00:29:31.617 Melodysheep / John D. Boswell Additional Visuals By Julius Horsthuis 00:29:31.617 --> 00:29:32.367 Additional Visuals By Julius Horsthuis Konstantin Kovalenko 00:29:32.367 --> 00:29:33.237 Julius Horsthuis Konstantin Kovalenko NASA 00:29:33.237 --> 00:29:34.617 Konstantin Kovalenko NASA Evolve 00:29:34.617 --> 00:29:36.117 NASA Evolve Special Thanks To 00:29:36.117 --> 00:29:36.917 Evolve Special Thanks To Juan Benet 00:29:36.917 --> 00:29:37.717 Special Thanks To Juan Benet Julius Horsthuis 00:29:37.717 --> 00:29:39.227 Juan Benet Julius Horsthuis Konstantin Kovalenko 00:29:39.227 --> 00:29:40.707 Julius Horsthuis Konstantin Kovalenko My Patreon Supporters 00:29:40.707 --> 00:29:41.997 Konstantin Kovalenko My Patreon Supporters Support This Production At 00:29:41.997 --> 00:29:43.557 My Patreon Supporters Support This Production At patreon.com/melodysheep 00:29:43.557 --> 00:29:44.327 Support This Production At patreon.com/melodysheep Melodysheep.com 00:29:44.327 --> 00:29:45.097 patreon.com/melodysheep Melodysheep.com Twitter: @musicalscience 00:29:45.097 --> 00:29:46.677 Melodysheep.com Twitter: @musicalscience Instagram: @melodysheep_ 00:29:46.677 --> 00:29:47.837 Twitter: @musicalscience Instagram: @melodysheep_ An 00:29:47.837 --> 00:29:49.227 Instagram: @melodysheep_ An Amber Mountain Studios 00:29:49.227 --> 00:29:59.379 An Amber Mountain Studios Production 00:30:07.787 --> 00:30:08.717 LIFE 00:30:08.717 --> 00:30:13.439 LIFE BEYOND 00:30:15.365 --> 00:30:22.000 Next on Life Beyond: Make contect with intelligent life Surviving the end of the universe The physics of alien life & more 00:30:22.000 --> 00:30:26.000 Subtitler: Ernesryst Sautrie Erick Soares Figueiredo fpetras