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

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

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

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

There is no question that the Tyrannosaurus rex was big. In fact, it may have been Earth’s biggest land predator of all time.

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

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

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