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

"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 ...

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.

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

“Hadrosauroidea is a diverse, highly specialized clade of ornithischian dinosaurs,” or dinosaurs with pelvic structures more ...