Pachycephalosaurus is a Rare Ornithiscian Herbivore An ornithischian dinosaur, Pachycephalosaurus lived during the Late Cretaceous Period about 65 million years ago. It was one of the last non-avian dinosaurs living on earth before the Cretaceous-Paleogene extinction event. Known as the bone-headed, or dome-headed, dinosaur this is the largest dinosaur of the Pachycephalosaria … [Read more...]
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