TED: Svante Pbo: DNA clues to our inner neanderthal - Svante Pbo (2011)
More info... Sharing the results of a massive, worldwide study, geneticist Svante Pbo 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.