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Sail-backed dinos had semiaquatic lifestyle

Isotopic analyses of fossils suggest crocodile-like habits

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12:41pm, February 12, 2010

Paleontologists may have solved the mystery of how spinosaurs and tyrannosaurs — two dinosaur groups that included many large, fierce predators — could have lived in the same regions at the same time. A new study suggests that, like many pairs of surly neighbors, they simply avoided each other.

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