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What evidence shows that tyrannosaurs ate other dinosaurs?
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tyrannosaur
The fossilized remains of Sue, the most complete Tyrannosaurus rex skeleton in the world, on display at the Field Museum of Natural History, Chicago.
Paleontologists have identified several lines of evidence confirming that tyrannosaurs were voracious predators that consumed other dinosaurs.12
Key evidence includes:
- Direct Fossil Remains: Scientists have discovered tyrannosaur coprolites (fossilized feces) containing crushed bone fragments from other dinosaurs. Additionally, gut contents preserved within specimens provide direct proof of their diet.132
- Bite Marks: Remains of various dinosaurs have been found with distinct tyrannosaurid bite marks. These marks demonstrate that these predators could easily crush the skulls, pelvises, and limbs of their prey.12
- Anatomical Adaptations: The skull and dentition of tyrannosaurs were highly specialized for a predatory lifestyle. Their teeth were designed for a "puncture and tear" feeding method, allowing them to anchor themselves and strip flesh from bone. Furthermore, forward-facing, keyhole-shaped eye sockets suggest accurate depth perception, a trait often associated with active hunters.4
- Cannibalism: Bite marks identified on the bones of other tyrannosaurs, particularly T. rex, are interpreted by many researchers as evidence of cannibalism.12
While some debate exists regarding whether they were strictly hunters or opportunistic scavengers, evidence suggests they likely engaged in both behaviors.4