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 ...
He plunged three stories and smashed his head on a pile of wood. The fall caved in a significant portion of his skull, damaging his brain, causing vision loss, especially in his left eye ...
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