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

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

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 ...

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