Some people actually have more than one biological identity embedded in their bodies, a rare and often harmless biological ...

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 ...

NEW YORK — New York City detectives questioning a boy facing a felony charge last year offered him a McDonald’s soda. When the boy left, they took the straw and tested it for his DNA. Although it did ...

Modern DNA kits make it easy to learn where your ancestors came from—just order a test, swab your cheek, and mail it to a lab ...