For decades, scientists believed that bonobos, one of our closest living relatives, were among the most peaceful primates.

Certain animals have been observed consuming naturally fermented fruit or plants that alter their behavior. In some cases, elephants, birds, and primates show visible changes in movement, balance, or ...

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

Have you ever noticed how people in love often behave child-like? From women stealing their partner's t-shirts and hoodies to ...

Scientists are finally decoding the orgasm face. Explore how human evolution, primate behavior, and mate selection shape our ...

While he appears to have made a new friend, the viral monkey still keeps his IKEA plushie close.

Humans perceive emotional expressions displayed by non-human primates and spontaneously mimic these expressions, according to a study published in the open-access journal PLOS One by Ursula Hess from ...

Historically considered a more peaceful species than their chimpanzee cousins, bonobos are actually just as aggressive -- but target their ire most often at males, according to a study published ...

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

A baby Japanese macaque named Punch, who previously became an Internet celebrity because of his history of loneliness, began ...

Fossils show that howler monkey ancestors were eating leaves 13 million years ago, shaping body size and evolution.

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 ...