Tyrannosaurus rex Is Not One Species, But Three Different Ones

An evaluation of over three dozen specimens of Tyrannosaurus rex finds that they exhibit such a outstanding diploma of proportional variations that the sample favors a number of species not less than partly separated by time. Tyrannosaurus rex, or T. rex for brief, is the one recognised species of the dinosaur genus Tyrannosaurus so far. “The title Tyrannosaurus […]