A study of fossilized feces and vomit attempts to piece together why dinosaurs were so evolutionarily successful.

Beyond their bills and crests, duck-billed dinosaurs also had sizable bodies and a mouthful of teeth that were constantly falling out. Overall, they were good at surviving and did so in one form or ...

The fossilized tyrannosaur teeth are thought to date to around 135 million years ago and represent a first of its kind ...