More than 230 million years ago, long before giant dinosaurs thundered across Earth, a chicken-sized creature walked near the equator in what is now Wyoming. That small but mighty dinosaur is changing ...

Tenontosaurus fossils found in West Texas, the southernmost record of the dinosaur and a key to the Early Cretaceous.

A remarkable fossil unearthed in Africa is rewriting the story of dinosaur origins. The 225-million-year-old leg bone, ...

Bird beaks come in almost every shape and size—from the straw-like beak of a hummingbird to the slicing, knife-like beak of an eagle. We have found, however, that this incredible diversity is ...