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DINOSAURS
Pachycephalosaurus
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Pachycephalosaurus () is a genus of pachycephalosaurid ornithischian dinosaur. The type species, P. wyomingensis, is the only known definitive species. It was among the last species of non-avian dinosaurs on Earth before the Cretaceous–Paleogene extinction event, which lived during the Maastrichtian age of the Late Cretaceous period in what is now western North America.
Overview excerpt from Wikipedia contributors · Pachycephalosaurus, under CC BY-SA 4.0. Excerpt may be shortened. Overview retrieved 2026-10-09.
