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 rchaeologists in Argentina have unveiled a “perfectly preserved” dinosaur egg that has survived for roughly 70 million ...

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 ...

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 ...

Scientists discovered that some dinosaur “mummies," such as Edmontosaurus annectens, weren’t preserved skin but clay molds ...