Researchers have controversially argued there is enough variation in samples to point towards three species of Tyrannosaur, not one.
Tyrannosaurus rex may have been three separate species, say scientists, rex
Steve Brusatte, paleontologist: 'The most terrifying thing about the tyrannosaurus was not its jaws but its intelligence', Culture
New study refutes claim that T rex could have been three different dinosaur species - Yahoo Sports
Tyrannosaurus Remains Hint at Two Possible Species Distinct from T. rex
Tyrannosaurus rex may have been three separate species, say scientists, rex
How many T. rexes were there? Billions.
Dinosaur bigger and older than the T. rex once roamed the Earth, scientists find - Science News
Scientists propose Tyrannosaurus had three species, not just 'rex, dino t rex rtx
T-rex reigns as king of dinosaurs
How to tell if a T. rex is expecting
The Dino That Looked T. Rex-y Long Before T. Rex
Newly discovered, primitive cousins of T. rex shed light on the end of the age of dinosaurs in Africa
Bold theory' that Tyrannosaurus rex is 3 species gets stomped to pieces