— -- Unseen by anyone else on a hike, a snake crosses your path. What would you do? Chimps, our closest animal cousins, emit soft hoots to warn their unaware friends about the unseen danger. But ...

When Aristotle claimed that humans differ from other animals because they have the ability to be rational, he understood rational to mean that we could form our views and beliefs based on evidence, ...

New research on chimpanzees is forcing scientists to rethink where the line between human and animal minds really lies. In carefully designed experiments, chimps are not just grabbing at treats or ...

KIBALE NATIONAL PARK, Uganda (AP) — The man tracking chimpanzee movements in a rainforest is required to follow the primates wherever they go — except up in the trees. Onesmas Ainebyona stalks the ...

Jane Goodall’s research at Gombe Stream National Park revolutionized our understanding of chimpanzee intelligence. In 1960, she observed a chimp named David Greybeard stripping leaves from twigs to ...