A group of researchers has estimated how long it took Tyrannosaurus rex to reach its full size — and the time period is ...

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 ...

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

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

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

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

By counting visible and hidden rings, researchers found that T. rex did not reach full size until 35 to 40 years of age.

Scientists have discovered what they believe to be a new species of theropod dinosaur — making it a close relative of the Tyrannosaurus rex. A group of researchers said they recently uncovered rare ...

Dinosaurs haven’t roamed the Earth for millions of years, but the nature of their reign has sparked no shortage of controversial debates among paleontologists that remain unresolved today. Late last ...

Young T. Rex or a New Dinosaur? New Bones Add to the Debate NEW YORK (AP) — Scientists have long puzzled over the origins of a mysterious dinosaur excavated in the 1940s: Was it a young T. rex or ...

Drivers on Highway 231 in Montgomery County now have a towering metal companion watching over their commute.