From tool-using chimpanzees to puzzle-solving capuchins, the primate world is packed with surprising brainpower. But how do the planet’s cleverest monkeys and apes really compare with human intelligen ...

When you learned about the history of human evolution in school, there's a good chance you were shown one all-too-familiar image. That picture probably showed a conga line of human-like creatures, ...

Humans not only recognize emotions on the faces of monkeys and apes but also unconsciously mimic those expressions.