And the first place we've done that is in Southern Siberia in the Altai Mountains at a place called Denisova, a cave site in this mountain here, where archeologists in 2008 found a tiny little piece of bone this is a copy of it that they realized came from the last phalanx of a little finger of a pinky of a human.

Sharing the results of a massive, worldwide study, geneticist Svante Pääbo shows the DNA proof that early humans mated with Neanderthals after we moved out of Africa. He also shows how a tiny bone from a baby finger was enough to identify a whole new humanoid species.