Most people alive today carry fragments of Neanderthal DNA in their genome. Now scientists are gaining a more intimate understanding of the ancient encounters that put it there.
One of the biggest discoveries about human evolution in recent decades is that, tens of thousands of years ago, Neanderthals and modern humans interbred. As a result, most people alive today carry a bit of Neanderthal DNA in their genome — and that r... [1108 chars]