During their reign of dominance on Earth for more than 160 million years, dinosaurs evolved into many diverse species. Although some species were vegetarian and harmless, others were fierce carnivores ...

A new study suggests Tyrannosaurus rex’s tiny arms were the evolutionary price of developing a gigantic head and a devastating bite.

At least five groups of two-legged, mostly meat-eating theropod dinosaurs experienced a shortening of the upper arms over the course of their evolutionary journey. But why did they have such comically ...

A new study documents that the robustness of skulls in carnivorous dinosaurs began to evolve first, a direct response to the increasing size of the plant-eating dinosaurs they hunted, shortly after di ...

A new study suggests that certain theropods—two-legged, mostly meat-eating dinosaurs—had shrunken forelimbs as an ...

Tyrannosaurus rex is often seen as the unstoppable king of the dinosaurs, but life in the Hell Creek ecosystem was far from ...

When you think of a Tyrannosaurus rex, the first thing that comes to mind is its gigantic, bone-crushing jaws, sharp teeth and fearsome stature. But then, immediately after that, a slightly more ...

The mystery of Tyrannosaurus rex's disproportionately small arms may have finally been unraveled by a new study. The research ...

By Will Dunham May 29 (Reuters) - Tyrannosaurus rex possessed a preposterously massive skull - 5 feet long (1.5 meters) and ...

A new exhibition, Jurassic Oceans, showcases the fearsome creatures that lurked below the surface – and offers a stark warning about the impact of warming waters on marine ecosystems today ...

A new study has found that the T. rex's arms evolved to become smaller at the same time as its head grew to catch more prey ...

The Tyrannosaurus rex is among the most well-known dinosaurs. Huge skull, massive teeth, a body weighing tons—and then those tiny arms. Few features of the famous predator seem as odd at first ...