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 ...

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

Sixty-six million years ago, a massive asteroid smashed into Earth. Life has undergone at least five mass extinctions in the ...

Researchers have unearthed the tiny, fossilized teeth of the earliest-known relative of primates, pushing its range further south than ever before and giving us new insights into how it spread through ...

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

Research suggests 66 percent of primate species are vulnerable, endangered, or critically endangered and 85 percent of primate species are in decline. In many ways, humans are largely to blame. While ...

Add Yahoo as a preferred source to see more of our stories on Google. When you buy through links on our articles, Future and its syndication partners may earn a commission. Primates have larger brains ...

Primate brains may have grown larger and more complex thanks to a fruit-filled diet, a new study suggests. The researchers analyzed the brain sizes and diets of over 140 primate species spanning apes, ...

Humans not only recognize emotions on the faces of monkeys and apes but also unconsciously mimic those expressions.