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

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

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

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 ...

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

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 ...

Humans perceive emotional expressions displayed by non-human primates and spontaneously mimic these expressions, according to ...

Humans perceive emotional expressions displayed by non-human primates and spontaneously mimic these expressions, according to a study published March 11, 2026, in the open-access journal PLOS One by ...

The drugs have names that sound like small planets: semaglutide, liraglutide, lixisenatide. Collectively, they belong to a class of glucagon-like peptide 1 (GLP-1) analogs that has reshaped the ...

You’ve probably seen the heartbreaking photos and videos of Punch, a baby macaque at Ichikawa City Zoo, who was abandoned by his mother at birth and has since captured hearts across Japan and around ...