Earth was a terrifying place during the Cretaceous period, some 66 million to 145 million years ago. During its tail end, Tyrannosaurus rex prowled the land. And a little before that, another kind ...

Call it a sea rex. Just when you thought it was safe to go back in the water, scientists have discovered a giant, bus-size ...

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.

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 ...

A Late Cretaceous face-off between an adult Nanotyrannus (left) and two juvenile T. rex, with a sub-adult T. rex watching from a distance. The scene evokes a preface to the NHMLAC’s famous T. rex trio ...

At least five groups of two-legged, mostly meat-eating theropod dinosaurs experienced a shortening of the upper arms over the ...

The Nagatitan dinosaur found in Thailand is Southeast Asia's largest on record, measuring 27m and weighing up to 30 tonnes, a study confirms.

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 ...