Tyrannosaurus rex should be split into three species

Tyrannosaurus Rex May Have Been Three Species Instead Of One

T. rex may have hidden its teeth behind lips

Did T. rex Just Get Split In Three? – New Tyrannosaurus Species

Should T. rex be 3 species? New study sparks fierce debate.

Controversial paper suggests there are three Tyrannosaurus species

What animals and plants lived alongside the T. rex? What did T. rex's environment look like? - Quora

Are There Three Tyrannosaurus Species? T. rex is Studied

Splitting T. Rex Into 3 Species Becomes a Dinosaur Royal Rumble - The New York Times

T.rex is the only Tyrannosaurus species, say scientists - BBC Newsround

Theropoda - an overview