An artist’s rendering of a human skull, at left, and a Neanderthal skull. Most people alive today carry a bit of Neanderthal DNA in their genome, the result of interbreeding tens of thousands of years ago.
An artist’s rendering of a human skull, at left, and a Neanderthal skull. Most people alive today carry a bit of Neanderthal DNA in their genome, the result of interbreeding tens of thousands of years ago.