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

Roughly 425 million years ago, in the warm seas over what is now southern China, there lived a meter-long bony fish with jaws ...

Tiny fossil teeth from Colorado are revealing new clues about the very first relatives of primates, including humans.

"It's a really strange animal, and the weird twist in the jaw drove us crazy trying to figure it out." ...

Researchers working near the Amazon rainforest in Brazil unearthed a twisted fossilized jawbone and couldn’t figure out what they were looking at. Was it broken? Deformed? Did i ...

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 ...