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

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

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

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

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

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.

By cutting into a tiny throat bone, Princeton's Chris Griffin showed that it belonged to an adult of a smaller tyrannosauroid cousin, not a juvenile T. rex.

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 ...

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 ...