Monkey

Orangutans nurse for a huge chunk of their babies' childhoods, especially when fruit gets scarce.

A morbidly obese monkey named Uncle Fatty is shining light on a growing problem: More and more animals in captivity and the wild are becoming obese from eating human foods.

A New York appeals court considers whether chimpanzees are entitled to a human's legal rights.

With one monkey species all but wiped out by yellow fever, what will happen to its hug-loving competitor?

Scientists have observed a chimpanzee cleaning the teeth of her adopted son, suggesting that humans might not be the only species with funerary rituals.

How does the famous, fictional giant ape measure up against some of the biggest animals on Earth — living and extinct?

A 24-year-old female chimpanzee in Japan has a genetic disorder not observed in her species since 1969, one that looks similar to Down syndrome in humans.