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

For years, paleontologists have debated whether the T. rex-like dinosaur in the fossilized tableau and others are indeed ...

A small dinosaur skull found in Montana 40 years ago was thought to be a young T. rex. Turns out it was a smaller, faster ...

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

Fossils paleontologists initially thought belonged to a juvenile Tyrannosaurus rex actually belong to a new species of ...

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

Now, a research team says new evidence resolves the case. The latest clue comes from a complete skeleton — first uncovered in Montana in 2006 — that scientists say identifies the mystery reptile as ...

Palaeontologists have argued for decades over whether certain fossils are young Tyrannosaurus rex or another species entirely ...

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

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

“The fossil, part of the legendary ‘Dueling Dinosaurs’ specimen unearthed in Montana, contains two dinosaurs locked in prehistoric combat: a Triceratops and a small-bodied tyrannosaur. That ...

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