Neanderthal DNA is not ancient history. It is in you right now, between 1 and 2% of your genome, and it arrived because tens of thousands of years ago, when your ancestors walked out of Africa and met people who had been living in Europe and Asia for hundreds of thousands of years, they recognized them as fellow humans. They mated. Repeatedly. Across continents. And the evidence is still sitting in your cells.

What would it feel like to find out the light skin in European and some Asian populations came from Neanderthals, not from modern humans? That Inuit genetic variants for digesting animal fat trace back to the same source? That a single individual found in Romania had a Neanderthal great-great-great-grandparent just five or six generations back, and another found in Siberia had a Neanderthal mother and a Denisovan father? Thirty years ago this was science fiction. Now it is a jaw from a Romanian cave.

The entire Neanderthal population across Europe and Central Asia was likely fewer than 100,000 people at any one time. Groups of 20 to 30, isolated by hundreds of kilometers. They were not picky. Neither, it turns out, were we.

Topics: Neanderthal DNA in humans, ancient DNA research, prehistoric interbreeding, Denisovans, human evolution

GUEST:Bence Viola

Originally aired on2026-03-04