Flying reptiles of the prehistoric skies ... and feathered dinosaurs illustrate the gradual evolutionary steps from non-avian dinosaurs to modern birds. Feathers initially evolved for insulation ...

Direct evidence of how the reptiles took to the skies is lacking ... died out in the same mass extinction that killed off non-avian dinosaurs. The oldest known pterosaur fossils date to ...

Several factors contributed to the survival of crocodiles, turtles, lizards and birds 66 million years ago, say our readers ...

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 ...

He says: “The respiratory system of non-avian dinosaurs has been the topic of considerable ... and in order to understand the origins and evolution of modern birds and reptiles.” To investigate the ...