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

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

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

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

A recent study reveals that the Tyrannosaurus rex dinosaur grew more slowly and lived longer than previously believed, altering our understanding of this iconic species.

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 ...

Previous studies of T. rex growth rings concluded they grew until around the age of 25, and then stopped. This was more of a ...

By cutting into a tiny throat bone, Princeton's Chris Griffin showed that it belonged to an adult of a smaller tyrannosauroid ...

Tyrannosaurus rex is still the biggest, baddest land predator of all time. It was the size of a city bus, with a head almost as long as Tom Cruise is tall and a smile every bit as devastating.

Fewer Tyrannosaurus rex fossils are available for scientific research because wealthy people are purchasing them for private collections, a new study has found. "The early growth stages of T. rex are ...