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

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 ...

T.rex lived longer and took more time to reach its maximum size than previously thought, according to new research.

New research shows Tyrannosaurus rex took nearly 40 years to reach full size, 15 years longer than previously believed, ...

For decades, scientists have been counting annual growth rings, similar to tree rings, found inside fossilized leg bones of Tyrannosaurus rex to estimate how old the giant carnivores were when ...

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

A new analysis reveals Tyrannosaurus rex reached its full size only after four decades, overturning previous estimates and ...

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

A new study reveals that the Tyrannosaurus rex took up to 40 years to fully grow.