A revised age for a German site indicates that our evolutionary cousins organized horse ambushes around 200,000 years ago.

Chimpanzees combine hoots, calls and grunts to convey far more concepts than with single sounds alone. It may be a first among nonhuman animals.

The unusual molecular makeup of Borrelia burgdorferi, which causes Lyme disease, may hold clues for understanding and treating the tick-borne disease.