Feelings of disgust serve an evolutionary purpose, protecting us from potential health threats.

Multiple, stone tools and a butchered rhino push back the date of early human presence in the Philippines by 642,000 years.

The International Association of Athletics Federations has capped testosterone levels in women athletes, which could impact stars like South Africa’s Caster Semeya.

Computer models show that Neanderthals appear to have had a smaller cerebellum than early Homo sapiens.

The 11,000-year-old fossil prints found in New Mexico's White Sands National Monument show prehistoric humans stalking a giant ground sloth.

The New York State Court of Appeals is grappling with a case in which petitioners take a bold position: Chimpanzees are persons, not things.

A cow cranium from the Neolithic Era appears to be the first evidence of either a veterinary procedure or a person practicing their human surgical skills on an animal.

Ubiquitous images of many animals are leading us to believe that some of the world's most endangered species are thriving in the wild.

The oldest Homo sapiens fossil found outside of Africa or the Levant suggests that early human migrations were far more frequent and geographically widespread than previously thought.

Four eyes are better than two, or at least that was the case for a monitor lizard that lived close to 50 million years ago.

The only civil war ever observed in wild chimpanzees was fueled by power, ambition, and jealousy, new research finds.

New research overturns the theory that the ability to float led to large and hefty marine mammals.