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

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

Come July, a Tyrannosaurus rex fossil is going under the hammer at Sotheby’s New York, with a colossal estimate to match.

A Royal Society research paper published May 20 suggests that T. rex, which averaged more than 40 feet long with arms ...

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 ...

Known as “Gus,” the dinosaur is one of the largest and most complete Tyrannosaurus rexes to ever be discovered. It may fetch ...

An analysis of 85 dinosaur species shows that tiny forearms in meat-eating dinosaurs were the result of an evolutionary trade ...

Tyrannosaurus rex was a late developer who kept growing until the age of 40, reveals new research. The largest-ever study of how the “king of dinosaurs” grew shows a much longer, slower path to ...

By Will Dunham May 28 (Reuters) - Tyrannosaurus rex was a huge land predator during the twilight of the age of dinosaurs. But ...

WASHINGTON (Reuters) - A group of researchers is proposing that Tyrannosaurus, the most famous of all dinosaurs and the ultimate apex predator, actually includes three species and not just the single ...

It ran on the tips of its toes. Its bite was brutal enough to take down a titan. And its neck was so strong, there was no way ...

A new analysis of Tyrannosaurus skeletal remains reveals physical differences in the femur, other bones and dental structures across specimens that could suggest Tyrannosaurus rex specimens need to be ...