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

These days, all fish have teeth. The shapes of their teeth vary according to diet, ranging from the little pegs of goldfish ...

Add Yahoo as a preferred source to see more of our stories on Google. A paleontologist holds a megalodon fossil tooth. Kristen Grace/FLMNH, CC BY-SA The ratios of strontium isotopes in fossil shark ...

For a shark that vanishes almost as quickly as it appears, the great white has left behind a surprisingly messy family ...

Compared to the great apes, humans have an exceptionally long childhood, during which parents, grandparents and other adults contribute to their physical and cognitive development. This is a key ...

What does this mean? First, grooves that resemble "toothpick" marks don't necessarily prove tool use. Natural chewing, abrasive foods, or even swallowed grit can produce similar patterns. In some ...

Mysterious fossil teeth found in the Caribbean belong to a family of extinct, land-dwelling reptiles that look like what you might get if you crossed a crocodile with a greyhound dog. This is the ...

Shark teeth are often considered the most common vertebrate fossils in the world, and for good reason. Each individual shark has rows upon rows of chompers that fall out and get replaced in conveyor ...

A fragment of upper jaw fossil from the Early Cretaceous is among the oldest examples of a toothless amphibian in the fossil record Chihiro Kai The arid valleys of Wyoming’s Cloverly Formation are ...

Bruce J. MacFadden receives funding from the National Science Foundation. Stephanie Killingsworth does not work for, consult, own shares in or receive funding from any company or organization that ...