Ancient crocodilians killed their smaller dinosaur prey by spinning their bodies in "death rolls," a move so violent that it tore the flesh and limbs clean away, researchers say.
Scientists used state-of-the-art imaging techniques to examine the cracks, fractures and breaks in the bones of a 150 million-year-old predatory dinosaur.
Tyrannosaurus rex had a long-nosed cousin that roamed the wilds of what is now China more than 66 million years ago.
The Fossil Hall at the Smithsonian National Museum of Natural History is now closed for a five-year, $48 million renovation.
Not only have a discovery of 190 million-year-old dinosaur embryos helped scientists better understand how the creature grew, but how they may be going about their research all wrong.
Scientists announced new research on Friday which linked the abrupt disappearance of half of earth's species 200 million years ago to a precisely dated set of gigantic volcanic eruptions.
For the first time, scientists can point to the volcanoes that killed the dinosaurs.
A new study finds that Cope's Rule does not apply to dinosaurs, sometimes.