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 ...

Add Yahoo as a preferred source to see more of our stories on Google. For decades, paleontologists have debated whether Tyrannosaurus rex was the sole apex predator of the end-Cretaceous. According to ...

The debate over Nanotyrannus’ identity is finally over. A remarkably preserved fossil proves it was a mature species, not a teenage T. rex. This discovery rewrites how scientists understand ...

For decades, paleontologists debated whether fossils were of a young T. rex or a species called nanotyrannus. A new study settles it: Nanotyrannus is real. A remarkably complete tyrannosaur specimen, ...

Millions of years ago, it was one of the most feared apex predators, and most popular in today’s pop culture. Tyrannosaurus rex translates to “tyrant lizard king” for a reason, dominating our view of ...

For decades, scientists have been counting annual growth rings—similar to tree rings—inside fossilized leg bones of Tyrannosaurus rex to estimate how old the giant carnivores were when they died and ...