Neanderthal males had a tendency to mate with human females, new research suggests.

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.

Learn how sex-biased interbreeding between Neanderthals and modern humans explains why Neanderthal DNA is largely missing from the X chromosome.

Geneticists have found an interesting pattern in how early humans and Neanderthals interbred—and it wasn't balanced.

When ancient humans interbred, new research shows that the pairings were predominantly male Neanderthals and female Homo sapiens.