The thick, peglike teeth were strong enough that they wouldn’t easily break when they hit bone. Next, consider the power behind those teeth: T. rex’s jaw muscles were massive, bulging mounds of sinew that provided enough energy to shatter the limbs, backs, and necks of Triceratopses, Edmontosauruses, and other prey. We can tell that Rex had some of the largest and most powerful jaw muscles of any dinosaur, based on the very broad and deep gullies on the skull bones where the muscles attached.
