The rise of dinosaurs is one of evolution's most intriguing success stories. Emerging in the mid-Triassic period, their ...

New York City’s American Museum of Natural History on Sunday will start displaying the nearly $45 million “Apex" dinosaur ...

Millions of years of evolution later, you can see the difference. Ornithischian dinosaurs like Triceratops and Stegosaurs, lacked these air sacs. And as a result most of them weren’t very big.

Whereas some hypotheses place these archosaurs as the sister-group to dinosaurs, others suggest that “silesaurids” are early ...

"We had absolutely no idea how the ornithischian body plan started to develop because they look so different to all the other dinosaurs. They have so many unusual features," the Cambridge ...

He's an expert in ornithischian (mostly plant-eating) dinosaurs. "It's a Thescelosaurus. It's from a group that we didn't have any previous record of what its skin looked like, and it shows very ...

Scientists from the Museum and Cambridge University have proposed radical changes to the dinosaur family tree, based on their analysis of hundreds of fossil features. The research provides important ...