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

The oceans of the Cretaceous of North America teemed with life. Gigantic fish and enormous marine reptiles hunted the Western Interior Sea. A unique new fossil demonstrates rare evidence of direct ...

Having a piece of dinosaur history meant visiting museums or joining a fossil dig site. But today, fossil collecting is no ...

This little critter hadn’t previously been identified south of Montana, but tiny, fossilized teeth show it had traveled into Colorado by around half a million years after the dinosaurs were wiped out.

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

A dinosaur’s tooth found embedded in the skull remains of another has revealed insights into the final moments of a fight between two giant beasts over 66 million years ago. The skull of the ...

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

Learn how newly discovered Purgatorius fossils in Colorado’s Denver Basin are filling gaps in the Paleocene fossil record and ...

Any hominid fossil find with molar teeth can be plugged into a new equation that reveals its species' prenatal growth rate. Gil Cohen-Magen/AFP via Getty Images Fossilized bones help tell the story of ...

Fossil teeth unearthed in Ethiopia suggest two distinct human ancestor species lived alongside each other between 2.6 and 2.8 million years ago, reshaping what is known about our evolution. The 13 ...