New research confirms that Nanotyrannus was not a juvenile T. rex, but a predatory species native to the Late Cretaceous ...

An argument over whether fossils from several small dinosaurs represent a juvenile Tyrannosaurus rex or smaller adults of a separate species may finally be settled. When you purchase through links on ...

A fossilized partial dinosaur skull originally thought to be from a Tyrannosaurus rex might actually represent a previously unknown species, according to a paper published Thursday in the journal ...