(CN) — A fossil long at the center of one of paleontology’s fiercest debates has finally given up its secret, and it’s rewriting what scientists know about Tyrannosaurus rex. Researchers studying the ...

A new specimen of one of the most controversial species of dinosaur has the potential to overturn decades of research on the T rex. Subscribe to our newsletter for the latest sci-tech news updates.

Scientists at the NC Museum of Natural Sciences have found that what was believed to be a juvenile T.rex skeleton is instead a distant relative, the first of its kind to be found in a full skeleton.

The skeleton of a Nanotyrannus lancensis is displayed as part of the "Montana Dueling Dinosaurs & Distinguished Fossils" collection at Bonhams auction house in New York, November 14, 2013. The ...

For decades, a small tyrannosaur skull has divided paleontologists over whether it belonged to a separate species or a teenage Tyrannosaurus rex. New research anchored in the spectacular “Dueling ...

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 ...

Scientists have long puzzled over the origins of a mysterious dinosaur excavated in the 1940s: Was it a young T. rex or another type of dinosaur? At first, researchers had only a tyrannosaur skull to ...

A handout illustration shows a pack of the dinosaur Nanotyrannus attacking a juvenile Tyrannosaurus in what is now Montana 67 million years ago. Anthony Hutchings/Handout via REUTERS THIS IMAGE HAS ...

WASHINGTON — At the twilight of the age of dinosaurs, an agile and vicious predator named Nanotyrannus prowled western North America, resembling a smaller version of Tyrannosaurus - about a tenth the ...