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

"The fossil, part of the legendary 'Dueling Dinosaurs' specimen unearthed in Montana, contains two dinosaurs locked in ...

A new dome-headed dinosaur species was discovered in Montana, a study released this month shows. Researchers discovered the ...

The debate over Nanotyrannus’ identity is finally over. A remarkably preserved fossil proves it was a mature species, not a teenage T. rex. This discovery rewrites how scientists understand ...

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

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

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

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 ...

Dinosaur "mummies" couldn't have been further from my mind as I trudged up a grassy knoll on the Zerbst Ranch in east-central ...

Researchers think the dinosaur perished close to the sea, sank onto the seabed and was rapidly buried by minerals.