National Geographic Channel Naked Science

Season 4 Episode 3

Stone Age Apocalypse

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Aired Thursday 8:00 PM Feb 28, 2007 on National Geographic
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Stone Age Apocalypse
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Human evolution is believed to have begun some six million years ago. Despite the passage of so much time, the amount of diversity among the DNA of all humans is minuscule. Some 75-thousand years ago, something apocalyptic occurred that left relative few humans alive to carry on the species. The cause of this "bottleneck" is now believed to have been a massive volcanic eruption on the Indonesian island of Sumatra.moreless
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