Pachycephalosaurus wyomingensis was the largest of the pachycephalosaurids—"thick-headed dinosaurs"—which featured extremely thick skullcaps. The top of a Pachycephalosaurus skull could be 9 ...
Scientists put their “stamp” on prehistory after discovering a massive dinosaur footprint in Mongolia said to have belonged to one of the largest two-legged animals ever to roam the Earth.
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