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20 May 2026 EN everythingdinosaur

New Study Solves Mystery of Tiny Theropod Dinosaur Arms

limb Dinosauria Tyrannosaurus study

Why did T. rex have tiny arms?  This is a question we get asked a lot at Everything Dinosaur.  Ironically, several, not closely related theropod lineages show forelimb reduction. Tyrannosaurus rex had famously small arms, but so did lots of other large meat-eating dinosaurs. A new study suggests that the tiny arms of some theropod

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We finally know why the T. rex had such small arms, and the answer is brutal