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

Tyrannosaurus rex is arguably the world’s most famous dinosaur, yet paleontologists are still learning more about this giant ...

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

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

Don't tell the producers of Jurassic World, but dinosaurs like Tyrannosaurus rex may have grown even larger than we previously thought based on the fossils they left behind. This is the conclusion of ...

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

Scientists have long puzzled over the origins of a mysterious dinosaur excavated in the 1940s: Was it a young T. rex or another type of dinosaur? At first, researchers had only a tyrannosaur skull to ...

The jaw fossil for Tyrannosaurus mcraeensis has key distinctions from T. rex. Paleontologists have discovered a new species of dinosaur that could be the closest-known relative of the famed ...

T. rex teeth — possibly up to six inches long — were thought by many to be too big not to protrude. In recent years, paleontologists have debunked other stereotypical portrayals of the dinosaur. Some ...

Then you look closer and notice the detail: how the ribs are built at different lengths to create a rib "cage," how the dark-colored bricks create the illusion of shadow and throw the light-colored ...