Scientists have discovered what they say is the smallest known dinosaur. The new species has been described by one team member as the "weirdest fossil" she has ever worked on. The specimen ...

Research published Thursday describes a collection of eggs and juvenile and adult skeletons from a dinosaur called Mussaurus patagonicus, which were found in Patagonia, Argentina. The dino is an ...

"It was clearly a concentration of very, very small animals ... Protoceratops and Mussaurus egg features with those from flying reptiles named pterosaurs, crocodiles, and dinosaurs.