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

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 Will Dunham WASHINGTON, Jan 15 (Reuters) - There is no question that Tyrannosaurus rex got big. In fact, this fearsome ...

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

An analysis of growth rings in the leg bones of 17 Tyrannosaurus rex individuals reveals that the dinosaurs matured much more ...

By cutting into a tiny throat bone, Princeton's Chris Griffin showed that it belonged to an adult of a smaller tyrannosauroid ...