Human Beings

French researchers conclude we have reached the pinnacle of our physical ability.

Overly-connected groups may stifle innovation, new experiments suggest.

Until recently, the reigning theory on who the first Homo sapiens in North America were pointed to the Clovis people, evidence of whose culture was discovered in the American Southwest. That theory has been powerfully challenged by, among others, Meadowcroft, an archaeological dig in western Pennsylvania that began in the 1970s.