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

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

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

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

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

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

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

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

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

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 ...