Why did T. rex have such tiny arms? Scientists now think it’s because its giant head became the ultimate hunting tool. Across ...

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 ...

Five different groups of predatory dinosaurs independently evolved disproportionately small arms, and it seems they did so ...

Two dinosaurs fossilized in combat, originally thought to involve a juvenile Tyrannosaurus rex testing its mettle against a Triceratops, actually feature a separate species frequently confused with ...

“The T. rex was built to fight like that; the Spinosaurus really wasn’t,” he said. This diversity of feeding strategies explains how multiple giant predators could share the same ecosystems without ...