A group of researchers has estimated how long it took Tyrannosaurus rex to reach its full size — and the time period is ...

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

Tyrannosaurus rex is arguably the world’s most famous dinosaur, yet paleontologists are still learning more about this giant ...

Pioneering techniques used in this research may soon be applied to other dinosaur fossils and alter the course of ...

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

By counting visible and hidden rings, researchers found that T. rex did not reach full size until 35 to 40 years of age.

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

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

Paleontologists have long debated claims of a dinosaur powerful enough to challenge T-Rex. Fossil evidence suggests ...

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

A duckbill dinosaur%27s fossilized skull and hide bear healed marks of a predator attack The healed bite marks look like they came from a Tyrannosaurus Rex The find represents the first unequivocal ...