This elusive inhabitant of equatorial African rainforests is the biggest of all monkeys and arguably the most beautiful. The 30kg males - three times the weight of females - are adorned with a golden ...

Recent research indicates a link between an animal’s gut bacteria and brain function. This may be true in humans, too.

A critically endangered monkey in the U.K. is celebrating a new beginning after overcoming a serious health scare. According to a press release published by Chester Zoo on Wednesday, March 18, a ...

Maybe you've seen the "Friends" episode where Ross adopts a pet monkey named Marcel – only to eventually give him to a zoo because he's a wild and exotic animal. If you're thinking about adopting a ...

A critically endangered monkey has given birth just months after surgeons saved her foot in a pioneering operation.

A critically endangered monkey has given birth just months after surgeons saved her foot in a pioneering operation. Masaya ...

Scientists call this phenomenon emotional mimicry. Biologists and psychologists consider this automatic matching of another’s ...

Fossils show that howler monkey ancestors, Stirtonia victoriae, were eating leaves 13 million years ago, altering body size ...

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 ...

An extinct relative of the howler monkey may have been the first leaf-eating primate in South and Central America ...

Thirteen million years ago, a group of medium-sized monkeys known for guarding their territory among the treetops with fearsome "howls" started doing something new. These monkeys, among the oldest ...

• 13 million years ago, a medium-sized monkey known for guarding its territory among the treetops with a fearsome “howl” started doing something new. This monkey, one of the oldest known ancestors of ...