The old "monkey see, monkey do" adage may rest on some neuroscientific evidence, finds a new Yale study. To examine how the primate brain facilitates cooperative behavior among individuals during ...

The way these monkeys react to seeing a prosthetic leg for the first time is equal parts fascinating and deeply moving.

Everyone loves a good bit of monkey business every now and then. It could be just playing around and being plain old silly. Or it could be an actual monkey doing something rather suspicious. Just take ...