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

This illustration depicts how the slender Khankhuuluu mongoliensis may have appeared as it roamed Mongolia during the Cretaceous period. The newest addition to the tyrannosaur family, the discovery of ...

Tyrannosaurus rex evolved in North America, but its direct ancestor came from Asia, crossing a land bridge connecting the continents more than 70 million years ago, according to a new study led by UCL ...

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