The evolution of tiny arms in several groups of meat-eating dinosaurs was likely driven by the development of strong, powerful heads, which were used to attack prey, according to a new study led by ...

Scientists may have finally solved the riddle of Tyrannosaurus rex’s small arms, which have always stood out as the oddest feature in the mightiest of dinosaurs, prompting jokes and a century-plus ...

Why did T. rex have such tiny arms? Scientists now think it’s because its giant head became the ultimate hunting tool. Across multiple dinosaur groups, stronger skulls and crushing jaws evolved ...