Nanotyrannus and Tyrannosaurus both were members of a lineage of meat-eating dinosaurs called tyrannosaurs, but were not the same genus, the researchers said. At the twilight of the age of dinosaurs, ...

What if everything we know about T. rex growth is wrong? A complete tyrannosaur skeleton has just ended one of paleontology's longest-running debates—whether Nanotyrannus is a distinct species, or ...

For decades, a small tyrannosaur skull has divided paleontologists over whether it belonged to a separate species or a teenage Tyrannosaurus rex. New research anchored in the spectacular “Dueling ...

For decades, paleontologists argued over the lone skull used to establish the distinct species Nanotyrannus. Was it truly a separate species or simply a juvenile Tyrannosaurus rex? A new paper ...

WASHINGTON, Oct 30 (Reuters) - At the twilight of the age of dinosaurs, an agile and vicious predator named Nanotyrannus prowled western North America, resembling a smaller version of Tyrannosaurus - ...