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Study Finds Tyrannosaurus Rex Did Not Reach Full Size until Age 40

P11)_So little we know__ in submersibles

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Reuters

21:37 JST, February 12, 2026

WASHINGTON (Reuters) — There is no question that Tyrannosaurus rex got big. In fact, this fearsome dinosaur may have been Earth’s most massive land predator of all time. But the question of how quickly T. rex achieved its maximum size has been a matter of debate.

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