For years, scientists have debated whether Nanotyrannus was simply ajuvenile version of the mighty Tyrannosaurus rex dinosaurs. A new study, however, puts this argument to rest. Researchers have now ...

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 ...

A case of mistaken identity seemingly finally settled this week could shake up vast swathes of what we thought we knew about the most ferocious of dinosaurs—Tyrannosaurus rex. For years, ...