The T. rex is known for having tiny arms. New study suggests why

We all know about the dinosaur called the Tyrannosaurus rex, also known as the T. rex, which is famous for its large head and itty-bitty arms. But why do they look like that?

The T. rex is known for having tiny arms. New study suggests why. We all know about the dinosaur called the Tyrannosaurus rex, also known as the T. rex, which is famous for its large head and itty-bitty arms. But why do they look like that? The T. rex has been highlighted in mainstream media for decades from books and movies like "Jurassic Park" to exhibits, like Sue at the Field Museum in Chicago. They've captured the world's attention, and a new study published in the scientific journal Proceedings of the Royal Society B. suggests a reason why the dinosaur evolved to look the way it did. "Everyone knows the T. rex had tiny arms, but other giant theropod dinosaurs also evolved relatively small forelimbs," the study's lead author, Charlie Roger Scherer, a professor at the University College London, said in a statement. "The Carnotaurus ha...