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

Dr Holly Ballard and her team at Oklahoma State University studied leg bones from 17 different T.rex fossils to get a better ...

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

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

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

NEW YORK (AP) — Scientists have long puzzled over the origins of a mysterious dinosaur excavated in the 1940s: Was it a young T. rex or another type of dinosaur? At first, researchers had only a ...

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