There are literally decades of research... based on a premise that this article overturns,” said one paleontologist.

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

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

Nanotyrannus, the “miniature T rex”, has been the centre of one of the fiercest debates in palaeontology. Scientists have ...

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

Specifically, whether or not certain fossils found in Montana belonged to a young Tyrannosaurus rex or a completely separate, ...