Why does a T. Rex have such small arms?

Tyrannosaurus Rex He had a large head and hind legs, but his arms were weak. There are likely a number of reasons for this. (Image source: Roger Harris/Science Photo Library via Getty Images)

Tyrannosaurus Rex He was a fierce hunter with the most powerful bite of any animal that ever walked the land. The monster roared late chalky Wilderness more than 66 million years ago, searching for Triceratops or E.Demontosaurus for nibbling.

The only thing that didn’t threaten the Tyrant Lizard King were his two little arms. T-Rex He wasn’t the only one dinosaur with small arms compared to the rest of the body; Many of its theropod cousins—a group of bipedal, mostly carnivorous dinosaurs—share this trait. But why did so many theropods develop such short arms?

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