The evolution of tiny arms in several groups of meat-eating dinosaurs was likely driven by the development of strong, ...

We’ve all seen the jokes about Tyrannosaurus rex and its tiny arms. One of the most fearsome predators ever to walk the Earth ...

Deep in Early Cretaceous South America paleontologists uncovered fragmentary fossils of a massive carnivore later named Tyrannotitan Its remains suggest a predator that rivaled later giants yet much ...