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

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

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

Researchers now identify the "dueling dinosaur" tyrannosaur as an adult Nanotyrannus, not T. rex. "This fossil...flips decades of T. rex research on its head," says Lindsay Zanno. Study reveals ...

Add Yahoo as a preferred source to see more of our stories on Google. An artist's rendering shows how newly identified dinosaur Khankhuuluu, much smaller than T. rex, might have looked. - Masato ...

A landmark investigation into Tyrannosaurus rex fossils has fundamentally altered scientific understanding of how long these ...

When you look at a fossil on display, you may envision the world 66 million years ago. You might feel the earth shake beneath you as a large predator stalks the ancient floodplain. It has long, sharp ...

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

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

(CNN) — Scientists have identified a previously unknown 86 million-year-old dinosaur species that fills an early gap in the fossil record of tyrannosaurs, revealing how they evolved to become massive ...