Paleontologists have long debated whether small tyrannosaurs were their own species or simply teenage T. rexes. This debate ...

North Carolina announces discovery of a new tyrannosaur species, Nanotyrannus, alongside T. rex from a study of the "Dueling Dinosaurs" fossils.

Jane, the dinosaur fossil housed at Rockford's Burpee Museum of Natural History, may not be a Tyrannosaurus rex as previously ...

Scientists have long debated whether a mysterious dinosaur excavated in the 1940s was a young T. rex or a distinct species.

Scientists have long puzzled over the origins of a mysterious dinosaur excavated in the 1940s: Was it a young T. rex or ...

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

For decades, paleontologists debated whether fossils were of a young T. rex or a species called nanotyrannus. A new study ...

Gov. Josh Stein announced on Thursday the discovery of a new tyrannosaur species, Nanotyrannus, at the North Carolina Museum ...

The Dueling Dinosaurs fossil contains two dinosaurs preserved together in a potential predator-prey encounter.

Researchers say they have uncovered a case of mistaken identity and found evidence of a species called Nanotyrannus lancensis.

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