We may finally know why dinosaurs like T. rex evolved tiny arms
Tyrannosaurus rex wasn’t the only predatory dinosaur with small armsROGER HARRIS/Getty Images/SCIENCE PHOTO LIBRARY With jaws like these, who needs big arms? A new analysis suggests dinosaurs like Tyrannosaurus rex had shrunken forelimbs because their massive, powerful heads became their primary tool for killing large prey, rendering their arms redundant....










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