You might have grown up reading about how thick-skulled Pachycephalosaurus rammed their heads into each other like bighorn sheep, fighting for social dominance or to impress mates. However, scientists have found that their skulls weren’t tough enough for that kind of action. When they studied the dinosaurs’ skulls, they found that the thick bone would have been too brittle to get smacked around without cracking. Instead, those unusual heads were likely used to attract mates.

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Pachycephalosaurus_skull

Photo by Wikimedia Commons user Ballista

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