Researchers have controversially argued there is enough variation in samples to point towards three species of Tyrannosaur, not one.
Is T. rex really three different species? There's debate.
New controversial study says the T. rex was actually three species
Researchers now have an estimate for just how many T. rex once roamed Earth
It's really cool when you think about it how all the T.rex specimens we currently have could have been separated as much by thousands or even millions of years considering T.rex entire
How to tell if a T. rex is expecting
New dinosaur was more dangerous than Tyrannosaurus Rex - Deseret News
New controversial study says the T. rex was actually three species
T. Rex might actually be three separate species: study
Researchers Identify Dinosaur Species 5 Times Larger Than Tyrannosaurus
Dominant Dinosaur That Lived Before T. rex Discovered - Field Museum
T. Rex might actually be three separate species: study
T.rex is the only Tyrannosaurus species, say scientists - BBC Newsround