Neanderthals once dominated ice age Europe, but then they disappeared. What happened to them? For 150 years scientists have been puzzled by the state of our closest relatives. They've looked at the archaeological evidence from every angle. Now they've turned to DNA, and a new idea is taking root. It's possible that Neanderthals live on - or at least their genes do - inside of us all.
Using dramatic reconstructions, interviews and CGI graphics the programs reconstruct the world of the Neanderthal. Is it possible that through the interbreeding of Neanderthals and Homo sapiens, every person of European descent may have a little bit of Neanderthal in them? And that Neanderthal genes might show up in fundamental traits, like big brains and sociability, that we think of as particularly human?