Like all biological populations, human groups can’t be neatly divided. Real populations are connected to each other, and their borders are blurred by migration and...


In Eurasia, humans once had Neanderthals for neighbors. That time of co-existence seems to have left its marks in our genome; non-Africans today share more genetic...


Transposable elements don’t proliferate in genomes at a steady pace; they often arrive in bursts. But models of neutral TE evolution assume transposition occurs at...