S1, E3: For 400,000 years, Neanderthals thrived across frigid, Ice Age Europe. What happened when Homo sapiens arrived, and how did these encounters change our species--including our DNA--in ways still with us today? From NOVA.

S1, E3: For 400,000 years, Neanderthals thrived across frigid, Ice Age Europe. What happened when Homo sapiens arrived, and how did these encounters change our species--including our DNA--in ways still with us today? From NOVA.