Billions of Tyrannosaurus rex roamed North America during their fascinating reign as top predators, according to a team of researchers that went about the daunting task of making the calculation.

This 92-million-year-old tyrannosaur was so small, it was only slightly larger than the skull of its mighty relative, Tyrannosaurus rex. The partial skeleton of a baby Tyrannosaurus rex is for sale on ...

Researchers have discovered the fossils of two new abelisaurs in Morocco, showing the diversity of dinosaurs in this region at the end of the Cretaceous period. Fossils of primitive cousins of T. rex ...

CC0 Usage Conditions ApplyClick for more information. Known for its massive size, powerful jaws and razor-sharp teeth, the Tyrannosaurus rex was one of the most fearsome predators of the Late ...

The piece illustrates the disparity of the Northern and Southern hemisphere’s evolution of terrestrial Cretaceous faunas after the Cretaceous Thermal Maximum. On the left, End Cretaceous Southern ...

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 ...