Doug was the leader of his chimpanzee group. He had quickly gained a reputation from human observers as a fair and tolerant ...

When a male chimpanzee wants to hit on a female without causing a scene, he sometimes has to get a little creative. "The alpha male, he can mate with whoever he wants, whenever he wants ...

Male dominance plays a big role in chimp society. Disputes are often resolved by threatening displays or by fighting. Female chimps lead a life much more solitary than that their bonobo cousins ...

CT/MRI skull and brain imaging data of a human (left), a chimpanzee (center), and a gorilla (right). Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted ...