Primatologist Vincent Nijman traced all the langur photos back to a singe trader in a bird market in East Java. He argues that the monkeys are ebony langurs that belong to the genus Trachypithecus.

A monkey perched on a branch at a zoo in the United Kingdom held a little treasure: a small orange baby peeking out from the safety of his mom’s arms. Meet Citrus, a newborn Francois langur monkey.

In the video, a preposterously cute, gray squirrel monkey named Dalton bonks his head against a computer screen in front of him. Wide-eyed and muttonchopped, Dalton has quite the setup—the screen, ...

We all know monkey see, monkey do. And Sam the squirrel monkey sees and does more than most. For one thing, he eats a wider range of food. He likes green vegetables—spinach and kale. True story: He ...

Monkeys once color-blind can now see the world in full color thanks to gene therapy. The results demonstrate the potential for such methods to eventually cure human vision disorders, from color ...