The first Tyrannosaurus rex I ever met was horribly out of date. Propped upright in the Cretaceous dinosaur hall at the American Museum of Natural History, the snarling tyrant held the same ...

A fossil site in Canada has yielded the heaviest Tyrannosaurus rex specimen ever found—an animal that weighed an estimated 19,500 pounds in life, far heftier than most elephants alive today. The ...

Suciasaurus rex, a meat-eating predator that lived about 88 million years ago, may soon be the official state dinosaur, thanks to eons of geologic upheaval, a chance discovery and some civic ...

When fossil hunters unearthed the remains of a dinosaur from the hills of eastern Montana five years ago, they carried several key characteristics of a Tyrannosaurus rex: a pair of giant legs for ...