An argument over whether fossils from several small dinosaurs represent a juvenile Tyrannosaurus rex or smaller adults of a ...

What if everything we know about T. rex growth is wrong? A complete tyrannosaur skeleton has just ended one of paleontology's ...

Small, fast new dinosaur species, Enigmacursor mollyborthwickae, shows that small, fast herbivores likely played vital ...

The Nanotyrannus's small skull has been the source of debate among dinosaur experts for at least four decades, according to the paper. Earlier research suggested it belonged to a young T. rex, but ...

The new species is called Nanotyrannus. Compared to the well known tyrannosaurus rex, a nanotyrannus was more speedy and ...

A new analysis of a controversial tyrannosaur fossil reveals the dinosaur wasn't a teenage version of T. rex as once thought, ...

London (CNN) — Scientists have discovered a new species of dinosaur — one that was dog-sized and roamed what is now the United States around 150 million years ago alongside familiar dinosaurs like ...

Now, a research team says new evidence resolves the case. The latest clue comes from a complete skeleton — first uncovered in ...

A dinosaur fossil discovery by a researcher from The University of Texas at El Paso may expand the known range of a species ...