pachycephalosaurs
pak ee SEF uh low SAWR us
Twenty million years before the dinosaurs went extinct a strange new
breed evolved!
They were small to medium sized, two legged herbivores possessing
unusually thick skulls.
It is believed that pachycephalosaurs
(Greek for "knucklehead") used their thick noggins to battle each other
for dominance in the herd, although it's possible their thick skulls
also came in handy for butting away curious predators.
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