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

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

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

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

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 ...

Previous studies of T. rex growth rings concluded they grew until around the age of 25, and then stopped. This was more of a ...

Using polarised light, the team identified previously unknown growth marks that had gone undetected in earlier studies. These ...

The findings suggest T. rex spent much of its life as a juvenile or subadult, growing quickly in some years and barely at all ...

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