challenging the widely held idea that differences in metabolism explain why birds fared so much better than non-avian dinosaurs. “This is really exciting for us as paleontologists,” study coauthor and ...

T he age of dinosaurs began over 230 million years ago, ushering in an era of unparalleled diversity and dominance.While the non-avian dinosaurs disappeared after the catastrophic asteroid impact ...

Given that the trait is shared between dinosaurs and their crocodilian cousins, paleontologists expected non-avian dinosaurs like Apatosaurus and Triceratops to have cloacae, too. A unique fossil ...

It is an ornithischian that lived on Earth 193 million years ago. "Along with other non-avian dinosaurs, they faced extinction at the end of the Cretaceous, while their early evolutionary history ...

The skull is from Vegavis iaai, an extinct duck-like bird that lived during the Late Cretaceous, just before non-avian dinosaurs went extinct. It’s one of very few 3D bird skulls known to ...