The human genome is a rich, complex record of migration, encounters, and inheritance written over thousands of millennia. Genomic research by members of Sarah Tishkoff's lab at the University of Pennsylvania are revisiting a particularly intimate chapter,

When Homo sapiens trekked out of Africa, our species encountered Neanderthal populations already inhabiting the vast expanses of Europe, Asia and the Middle East.

In a study published on Thursday in the journal Science, a team of researchers report that men with a lot of Neanderthal ancestry and women with a lot of modern human ancestry had a strong preference ...