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

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

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 ...

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

Many people think of tyrannosaurs as the formidable T. rex, but there’s a lot more to know about these prehistoric creatures. While T. rex was the largest of tyrannosaurs, there are many other species ...

Billions of Tyrannosaurus rex roamed North America during their fascinating reign as top predators, according to a team of researchers that went about the daunting task of making the calculation.

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

After speaking with paleontologist Dr. Kenneth Lacovara, I can honestly say — I didn't know as much as I thought! I mean, did you know dinosaurs likely didn't roar or that they still have living ...