CHRISTIAN DARKIN / SCIENCE PHOTO LIBRARY CHRISTIAN DARKIN / SCIENCE PHOTO LIBRARY
Pachyrhinosaurus dinosaur, computer artwork. This beaked herbivore lived in North America and Asia during the late Cretaceous period, 76-73 million years ago. Unlike other ceratopsian dinosaurs it did not have horns, instead having a bony protuberance on top of its snout. It was slow- moving and possibly lived in herds.
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