Ancient DNA is turning human prehistory into something startlingly intimate. Instead of a clean handoff from one species to another, the last 50,000 years look more like a long, tangled story of ...

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 ...

Genes make us who we are—but are they shaped by chance, natural selection, or something else?