A new study reveals Tyrannosaurus rex took 40 years to reach full size, not 30, as previously thought. Researchers analyzed ...

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

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

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

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

T. rex may not be the king of dinosaurs after all. An unearthed skull has revealed a close relative of the T. rex that may have been even larger than the previously-crowned apex predator. A study, ...

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

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

(CN) — A fossil long at the center of one of paleontology’s fiercest debates has finally given up its secret, and it’s rewriting what scientists know about Tyrannosaurus rex. Researchers studying the ...

New estimate says dinosaur grew fast, could have reached 9 tons. Oct. 16, 2011 — -- Johnny Cash might have said life wasn't easy for a dinosaur named Sue. She grew up quick and she grew up mean, ...

When you think of the largest carnivorous dinosaurs, you might picture a massive predator biting through bone in one devastating snap. That image fits Tyrannosaurus rex, but new research shows it ...