Eric Walker added How Many Tyrannosaurus Rexes Ever Lived on Earth? Here’s a New Clue. - The New York Times to Tyrannosaurus rex

Eric Walker added Tyrannosaurus - Wikipedia to Tyrannosaurus and Tyrannosaurus rex

Eric Walker added New species of dinosaur related to Tyrannosaurus rex and birds discovered on Isle of Wight - ABC News to Theropoda, Aves and Tyrannosaurus rex

Eric Walker added Tyrannosaurus rex and Tyrannosaurus - Wikipedia to Tyrannosaurus, and added Tyrannosaurus to Tyrannosaurinae

Eric Walker added a number of links to Tyrannosaurus rex, and added Tyrannosaurus rex to Tyrannosaurus