And it challenged — not for the first time, but more effectively than before — the assumption that the European past is the story of a people who have always looked like modern Europeans.

That assumption is wrong.

The people who built the first European civilization — if we can call the Mesolithic world a civilization — looked different.

They were replaced, or substantially replaced, by people who came from elsewhere.

And the light skin that many Europeans associate with their deepest identity is a relatively recent evolutionary acquisition, not an ancient one.

This is what the limestone cave in Somerset preserved for ten thousand years.

This is what the two-millimeter drill hole and the modern sequencing machines extracted.