These chimps used to be friends.

These animals used to be friends, but now they attack each other on sight.

A recent study performed on chimpanzees demonstrates that chimpanzees possess cognitive flexibility similar to that of humans. When circumstances or evidence change, chimps appear to do the thing ...

Chimps may revise their beliefs in surprisingly human-like ways. Experiments showed they switched choices when presented with stronger clues, demonstrating flexible reasoning. Computational modeling ...

Chimpanzees may have more in common with human thinkers than previously thought. A new study published in Science by an international team of researchers provides evidence that chimpanzees can ...