Scientists thought this fossil was a teen T. rex. Turns out it's a new tyrannosaur

A new look at the "Dueling Dinosaurs" fossil reveals that Tyrannosaurus rex was not the only tyrannosaur roaming the land.

Mysterious dinosaur skeleton thought to be a teenage T. rex is actually a rival species, researchers say

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

This tiny T. rex is actually a new species

Specifically, whether or not certain fossils found in Montana belonged to a young Tyrannosaurus rex or a completely separate, ...
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'I was wrong': Dinosaur scientists agree that small tyrannosaur Nanotyrannus was real, pivotal new study finds

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

Newly discovered skeleton rewrites ‘decades of research’ over T. rex

Newly discovered skeleton rewrites ‘decades of research’ over T. rex - The new skeleton is dubbed ‘Dueling Dinosaurs’ because ...

What is a nanotyrannus? What scientists recently discovered about the much-debated dinosaur

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

‘Dueling dinosaurs’ fossil forces a radical rethink of T. rex remains

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

Agile and vicious Nanotyrannus was not just a teenage T. rex

By Will Dunham WASHINGTON (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 ...