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

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

For decades, scientists have been counting annual growth rings—similar to tree rings—inside fossilized leg bones of ...

The world’s understanding of the Tyrannosaurus rex as a fearsome-looking predator with a face of razor-sharp fanged teeth may soon need to shift. Similar to humans, the T. rex had lips that concealed ...

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 ...

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 Tyrannosaurus rex is often shown baring massive, sharp teeth, like the ferocious creature in "Jurassic Park." But new research suggests that this classic image might be wrong.The teeth on T. rex ...

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 ...

For decades, scientists have been counting annual growth rings—similar to tree rings—inside fossilized leg bones of ...