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 ...

A controversial dinosaur fossil previously believed to be a juvenile Tyrannosaurus rex is in fact a different species altogether — the Nanotyrannus — a new study suggests. The research has up-ended ...

Scientists identified a new species of Tyrannosaurs that's likely a predecessor to T. Rex. The new species shows the dinosaurs got bigger a lot earlier than scientists originally thought. It also ...

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Khankhuuluu mongoliensis was slender with features like no other member of the tyrannosaur family tree. This illustration depicts how the slender Khankhuuluu mongoliensis may have appeared as it ...

Breakthroughs, discoveries, and DIY tips sent every weekday. Terms of Service and Privacy Policy. Picture this: Two dinosaurs with massive teeth and hulking figures ...