A paleontologist was trying to locate the site of a famous 1908 discovery when a rancher in Wyoming shared an important clue.

"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 ...

Scientists have long debated whether a mysterious dinosaur excavated in the 1940s was a young T. rex or a distinct species.

Many of them — including a duck-billed dinosaur mummy discovered in 1908 — hail from an area in eastern Wyoming. In the new study, scientists returned to this so-called mummy zone and found new ...

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

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.

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

Governor Josh Stein, the North Carolina Museum of Natural Sciences and NC State University announced Thursday that the ...

In 1999, the world of palaeontology was electrified by what seemed to be the discovery of the century. It was a fossil that ...

For many years, paleontologists have debated about whether there was a smaller relative of the Tyrannosaurus rex, or if those smaller fossils were really just awkward teenage versions of the king of ...

An analysis suggests Nanotyrannus is a separate, smaller dinosaur that lived alongside T. rex, settling a 30-year debate ...

The discovery of a small dinosaur has ended one of paleontology’s longest-running debates, revealing that Nanotyrannus was ...