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

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

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 ...

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

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

CHICAGO--For the first time, scientists have determined the lifelong growth pattern for the Tyrannosaurus rex. T. rex reached its massive adult size due to an extraordinary growth spurt that stretched ...

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