Everything scientists believed about the T-Rex could be wrong after a study proved the existence of its smaller cousin.

The Nanotyrannus genus has been debated for decades, with some paleontologists arguing that specimens thus classified are ...

There are literally decades of research... based on a premise that this article overturns,” said one paleontologist.

What if everything we know about T. rex growth is wrong? A complete tyrannosaur skeleton has just ended one of paleontology's ...

An analysis suggests Nanotyrannus is a separate, smaller dinosaur that lived alongside T. rex, settling a 30-year debate ...