Debate kicked off in 1988 when a single small tyrannosaur skull discovered four decades earlier was given its own species ...

For many years, paleontologists have debated about whether there was a smaller relative of the Tyrannosaurus rex, or if those ...

Paleontologists have examined an exceptionally well-preserved, near somatically mature tyrannosaur skeleton from the Hell Creek Formation of Montana.

A fossil once locked in prehistoric combat has just rewritten one of paleontology’s longest-running debates — and upended what scientists thought they knew about Tyrannosaurus rex.

The “dueling dinosaur” fossil still leaves more questions than answers as scientists now attempt to determine their causes of ...

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

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 longest-running debates – whether Nanotyrannus is a distinct species, or ...

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

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

High in the Argentinian Andes, a team of palaeontologists has found a small dinosaur fossil with the first hints of the extended neck that distinguishes sauropod dinosaurs like Diplodocus. Named ...