Dinosaur bones are like trees—every year is represented by a new ring, and paleontologists can count those concentric circles ...

Tyrannosaurus prowled western North America during the Cretaceous Period at the twilight of the age of dinosaurs before an ...

For decades, scientists have been counting annual growth rings—similar to tree rings—inside fossilized leg bones of ...

Tyrannosaurus rex lived longer and took more time to reach its maximum size than previously thought, according to a new study ...

A study of fossil bones shows Tyrannosaurus rex kept growing until around age 40, challenging long-held ideas about dinosaur ...

A comprehensive analysis of Tyrannosaurus rex fossils is surprising scientists with just how long these apex predators took ...

Almost everyone has heard of Tyrannosaurus rex, but how much do you actually know about this iconic dinosaur predator? Take ...

A landmark investigation into Tyrannosaurus rex fossils has fundamentally altered scientific understanding of how long these ...

A worthy matchup of big teeth, little brains. Picture this: Two dinosaurs with massive teeth and hulking figures circle each other, threatening a smackdown. Each was the most successful predator of ...

A new approach using the hyoid bone uncovered distinct growth patterns. A new study has brought clarity to a long-running ...

Almost a year ago, headlines proclaiming the sale of a largely complete T. rex-like dinosaur sparked an international custody battle that featured a confrontation at a public auction, a federal ...