Sharing the results of a massive, worldwide study, Svante Pääbo shows the DNA proof that early humans mated with Neanderthals after we moved out of Africa. (Yes, many of us have Neanderthal DNA.) He also shows how a tiny bone from a baby finger was enough to identify a whole new humanoid species. (Recorded at TEDGlobal 2011, July 2011, in Edinburgh, Scotland. Duration: 17:02.)
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