A bizarre two-clawed dinosaur found in Mongolia reveals rare claw preservation and offers new insight into therizinosaur ...

A fossil from China that's 150 million years old may be the world's earliest known bird. The discovery shows that the short tails characteristic of modern birds evolved much earlier than ...

Lesothosaurus diagnosticus was one of the most primitive and earliest ornithischians, or "bird-hipped" dinosaurs ... long. Its jaws were lined with small, serrated teeth for shredding plants and ...