In the cutthroat world of the ultimate apex predators, dinosaurs suffered colossal injuries and limped through a world rife with deadly infection and diseases. How did these amazing beasts manage to thrive despite their violent surroundings? Investigating a debilitating injury on the largest T. rex ever found, where muscle and tendon were ripped from a bone, Phil creates 3-D models of the healed T. rex's arm. Remarkably, he finds that the wrecked arm bone rebuilt itself.
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