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

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

Now, a new study of 17 tyrannosaur specimens, ranging from early juveniles to massive adults, has revealed that the king of ...

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

There is no question that Tyrannosaurus rex got big. In fact, this fearsome dinosaur may have been Earth's most massive land ...

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

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

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

The largest-ever study of how the “king of dinosaurs” grew shows a much longer, slower path to adulthood than scientists ...

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A study suggests that the Tyrannosaurus Rex reached its massive size over 40 years, contradicting earlier estimates of a ...

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 ...