1 99:59:59,999 --> 99:59:59,999 We are born to survive, in a world full of danger. 2 99:59:59,999 --> 99:59:59,999 Hardship makes a stronger. 3 99:59:59,999 --> 99:59:59,999 We dream impossible dreams and make them real, 4 99:59:59,999 --> 99:59:59,999 but we are not one. 5 99:59:59,999 --> 99:59:59,999 Mankind's struggles shape our destiny, 6 99:59:59,999 --> 99:59:59,999 and in those struggles, new worlds, new futures are born. 7 99:59:59,999 --> 99:59:59,999 Amidst the chaos of an unforgiving planet, most species will fail, but for one, all the pieces will fall into place, 8 99:59:59,999 --> 99:59:59,999 and a set of keys will unlock a path for mankind to triumph. 9 99:59:59,999 --> 99:59:59,999 This is our story, the Story of All of Us. 10 99:59:59,999 --> 99:59:59,999 Narrator: At the dawn of time, 11 99:59:59,999 --> 99:59:59,999 the universe into being, 12 99:59:59,999 --> 99:59:59,999 with it, every atom in our bodies. 13 99:59:59,999 --> 99:59:59,999 countless galaxies and innumerable stars, 14 99:59:59,999 --> 99:59:59,999 and around one of them, a blue planet, our Earth. 15 99:59:59,999 --> 99:59:59,999 No other known planet has both an atmosphere and liquid water, 16 99:59:59,999 --> 99:59:59,999 the conditions needed for life. 17 99:59:59,999 --> 99:59:59,999 Thirteen billion years after the universe begins, an unique species is born: mankind. 18 99:59:59,999 --> 99:59:59,999 Now in the grasslands of East Africa, we begin our struggle against the odds. 19 99:59:59,999 --> 99:59:59,999 A band of brothers, their leader the genetic ancestor of all mankind. 20 99:59:59,999 --> 99:59:59,999 Every man alive today shares a portion of his DNA. 21 99:59:59,999 --> 99:59:59,999 Two inches taller than a modern American, a natural athlete, a born hunter. 22 99:59:59,999 --> 99:59:59,999 This is his home, the Rift Valley of East Africa, a fertile laboratory for life. 23 99:59:59,999 --> 99:59:59,999 In his sights, a thousand pounds of meat, enough to feed his family of six for a month. 24 99:59:59,999 --> 99:59:59,999 Soon, there will be seven. The woman he shares his life is expecting their first child. 25 99:59:59,999 --> 99:59:59,999 Stereoscopic vision to accurately judge distance, ambidextrous hands, speed on two legs, 26 99:59:59,999 --> 99:59:59,999 but he has none of the natural weapons of Africa's other predators; 27 99:59:59,999 --> 99:59:59,999 he can't outrun a cheetah, nowhere near the strength of the lion, or the bone-crushing jaws of a hyena, 28 99:59:59,999 --> 99:59:59,999 so he invents. 29 99:59:59,999 --> 99:59:59,999 Machowicz: Tools make me better. Weapons make me more powerful. 30 99:59:59,999 --> 99:59:59,999 You have to be on two feet. 31 99:59:59,999 --> 99:59:59,999 You have to free up your hands, and freeing up your hands, 32 99:59:59,999 --> 99:59:59,999 and freeing your hands to work with tools changes the game, 33 99:59:59,999 --> 99:59:59,999 and there's no other species on this planet committed to weapon use and tool use like us. 34 99:59:59,999 --> 99:59:59,999 Narrator: Man's ability to project power, the key to controlling our world. 35 99:59:59,999 --> 99:59:59,999 We'll spend the next hundred millennia, perfecting weapons that kill at a distance. 36 99:59:59,999 --> 99:59:59,999 Sheridan: There's a window that's, that's closing. 37 99:59:59,999 --> 99:59:59,999 You've got half a second, and that's the kind of moment, where if you can explode and do the right thing, 38 99:59:59,999 --> 99:59:59,999 then you'll eat and survive, and if you blow it, then you're dead. 39 99:59:59,999 --> 99:59:59,999 Narrator: To prepare the kill, the greatest key to our survival: 40 99:59:59,999 --> 99:59:59,999 at 300 degrees, a spark, fire. 41 99:59:59,999 --> 99:59:59,999 Our planet is the only known place in the universe with the right conditions for fire to burn. 42 99:59:59,999 --> 99:59:59,999 It's the element that makes us who we are. 43 99:59:59,999 --> 99:59:59,999 Oz: Cooking our foods gives us a second stomach outside our body. 44 99:59:59,999 --> 99:59:59,999 Now we begin to digest the fats, the carbohydrates, the proteins, 45 99:59:59,999 --> 99:59:59,999 before we chew the food, making it easier for us to digest it, 46 99:59:59,999 --> 99:59:59,999 which means we get a smaller stomach and therefore a bigger brain. 47 99:59:59,999 --> 99:59:59,999 Narrator: Better nutrition boosts the human brain. 48 99:59:59,999 --> 99:59:59,999 Over 2 million years, it more than doubles in size, with trillions of connections. 49 99:59:59,999 --> 99:59:59,999 The most complex structure in the universe, letting us think, communicate, and love. 50 99:59:59,999 --> 99:59:59,999 Bourdain: It could be argued, any kind of society, began with the cooking of meat over flame. 51 99:59:59,999 --> 99:59:59,999 Narrator: But man is not always the hunter. 52 99:59:59,999 --> 99:59:59,999 [singing] 53 99:59:59,999 --> 99:59:59,999 Fire protects them from other predators, 54 99:59:59,999 --> 99:59:59,999 but this couple will be lucky to live to 30. 55 99:59:59,999 --> 99:59:59,999 Their unborn child has only a 50% chance of surviving adulthood. 56 99:59:59,999 --> 99:59:59,999 There are perhaps only 10, 000 humans on the planet, 57 99:59:59,999 --> 99:59:59,999 fewer people than are born in a single hour today, 58 99:59:59,999 --> 99:59:59,999 scattered in small, isolated groups, always on the brink of extinction, 59 99:59:59,999 --> 99:59:59,999 but around 70,000 years ago, a few hundred pioneers wonder out of Africa, the beginning of an extraordinary adventure. 60 99:59:59,999 --> 99:59:59,999 Gates: Everyone is related to those first pioneers, who did venture away out of their homeland and looked beyond. 61 99:59:59,999 --> 99:59:59,999 Williams: We are a restless bunch, we humans. 62 99:59:59,999 --> 99:59:59,999 We are always looking over there, and over there may mean oceans or mountains 63 99:59:59,999 --> 99:59:59,999 or continents away. This is our hard-wiring, our DNA. 64 99:59:59,999 --> 99:59:59,999 Narrator: Over 50,000 years, mankind settles the Middle East, Asia, Australia, and Europe. 65 99:59:59,999 --> 99:59:59,999 As we spread out, a slight shift of the Earth's axis away from the sun cools the planet. 66 99:59:59,999 --> 99:59:59,999 Average temperatures drop up to 14 degrees, 67 99:59:59,999 --> 99:59:59,999 a third of the planet under ice.