What Your DNA Reveals About the Sex Life of Neanderthals

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.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.