Tyrannosaurus rex Is Not One Species, But Three Different Ones

An analysis of over three dozen specimens of Tyrannosaurus rex finds that they exhibit such a remarkable degree of proportional variations that the pattern favors multiple species at least partly separated by time.

Dickinson paleontologist addresses new T-Rex study - The Dickinson Press

Small T. rex 'cousins' may actually have been growing teens

What is the Tyrannosaurus rex closest living relative? - Quora

Tyrannosaurus rex should be split into three species, controversial study suggests, Science

Tyrannosaurus rex Is Not One Species, But Three Different Ones

How T. Rex Became a Global Paleo-Celebrity - WSJ

Tyrannosaurus rex may actually be three separate species

Giganotosaurus vs. T. Rex: a big dinosaur battle

T-rex to End All T-rexes Discovered in Saskatchewan