A new study reveals Tyrannosaurus rex took 40 years to reach full size, not 30, as previously thought. Researchers analyzed ...

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

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

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

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

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

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

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

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

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

The Tyrannosaurus rex is often shown baring massive, sharp teeth, like the ferocious creature in "Jurassic Park." But new research suggests that this classic image might be wrong. The teeth on T. rex ...

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