At the twilight of the age of dinosaurs, an agile and vicious predator named Nanotyrannus prowled western North America, ...

After decades of fierce debate, researchers say fossils once thought to be juvenile T. rex actually belong to a separate, ...

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

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

For more than three decades, paleontologists have argued over whether a lithe predatory dinosaur called Nanotyrannus ever ...

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

Ars Technica has been separating the signal from the noise for over 25 years. With our unique combination of technical ...

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

A new study reveals that fossils once believed to belong to a teenage Tyrannosaurus rex may actually belong to a separate species ...

A long-standing dinosaur mystery has finally been solved, revealing surprising details about a small predator that once lived in the shadow of the mighty Tyrannosaurus rex.

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

New research confirms the Nanotyrannus dinosaur was not a young T. rex, but a separate species, reshaping our view of ...