Tiny, tooth-sized fossils have just reshaped the story of our deepest ancestry. Paleontologists have discovered the southernmost remains ever found of Purgatorius—the earliest-known relative of all ...

Three tiny Purgatorius teeth found in Colorado are helping scientists trace how early primates evolved and spread across North America.

Primates—the group of animals that includes monkeys, apes and humans—first evolved in cold, seasonal climates around 66 million years ago, not in the warm tropical forests scientists previously ...

It’s a baby only a mother could love. A rare wide-eyed pygmy slow loris — with eyes as big as its ears and a sleep cycle that would drive even the most patient parents bonkers — has become the first ...

Scientists have discovered new fossil teeth of the earliest known primate relative, Purgatorius. The find shows how ancient primates evolved and spread across the continent. This was reported on March ...