Everything scientists believed about the T-Rex could be wrong after a study proved the existence of its smaller cousin.

Newly discovered skeleton rewrites ‘decades of research’ over T. rex - The new skeleton is dubbed ‘Dueling Dinosaurs’ because ...

Now, a research team says new evidence resolves the case. The latest clue comes from a complete skeleton — first uncovered in ...

The fossil skull of a mystery tyrannosaur has been the subject of debate since it was discovered in the 1940s.

A new tyrannosaur species has just been found in Canada, and paleontologists say that it is the oldest Tyrannosaurus rex ever found in the country. Thanatotheristes degrootorium, who lived nearly 80 ...

The only known juvenile specimen of the Ceratosaurus—a carnivorous dinosaur that lived around 149 to 154 million years ago—is on public view at Sotheby’s in New York as of Tuesday. Displayed for the ...

A major shake-up in dinosaur paleontology reveals that what scientists have long called "Tyrannosaurus" is actually two ...

A new palaeontological breakthrough based on analysis of the “Dueling Dinosaurs” fossil has revealed that the T. rex had a ...

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

Scientists have long puzzled over the origins of a mysterious dinosaur excavated in the 1940s: was it a young Tyrannosaurus ...

Fossils of primitive cousins of T. rex that had short, bulldog snouts and even shorter arms have been discovered by scientists in Morocco. The two new dinosaur species belong to the Abelisauridae, a ...

The end Cretaceous Northern Hemisphere fauna was dominated by Tyrannosaurids (such as Tyrannosaurus rex), hadrosaurs and ceratopsian ornithischian dinosaurs. Credit: Pedro Salas and Sergey Krasovskiy.