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 ...

Scientists have long puzzled over the origins of a mysterious dinosaur excavated in the 1940s: Was it a young T. rex or another type of dinosaur? At first, researchers had only a tyrannosaur skull to ...

“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 ...