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

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.

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

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

While hiking through the fossil-rich terrain of North Dakota, three children made a discovery that paleontologists are calling one of the rarest in recent memory — the skeleton of an adolescent ...