Chimpanzees possess immense upper body strength, powerful jaws, and fast reflexes that make them dangerous in direct confrontations. When aggression is triggered, they can bite, grab, and overpower ...

Bonobos for years have had the reputation of being the cool hippies of the simian world, with a “make love, not war” ethos, in ​contrast to their belligerent cousins, the chimpanzees. But is this ...

Chimpanzees have a reputation for being aggressive, while bonobos are often seen as their peaceful counterparts. This contrast has frequently been used to explain different sides of human nature.

For years, anthropologists have watched wild chimpanzees "go ape" and attack each other in coordinated assaults. But until now, scientists were unsure whether interactions with humans had brought on ...

Larger, more tolerant chimpanzee groups manage shared resources more effectively and exhibit less aggressive competition than smaller, more competitive groups. Tolerance functions as a group-level ...

Chimps in the wild engage in deadly battles with rival troops to increase their reproductive success, suggests new research. The Ngogo chimps of Uganda’s Kibale National Park have long been known for ...

Aggression in the animal world can be tricky to define. Some animals may seem harmless in one moment and highly dangerous in ...

Why the Latest Science Leads Us to a New Theory of Human Nature, by Jonathan Leaf (Bombardier, 320 pp., $21) Ever since Darwin, biologists have believed that much could be learned about human nature ...