Eric Walker added Do all birds have a common ancestor? : askscience to Theropoda

Eric Walker added Hot Dinosaur Summer - The New York Times to Chicxulub meteor and Theropoda

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 Theropoda - Wikipedia to Theropoda

Eric Walker added a number of topics and a number of links to Aves, and added Aves to Theropoda and Amniota

Eric Walker added Tyrannosaurinae to Tyrannosauridae, and added Tyrannosauridae to Theropoda

Eric Walker added Furileusauria to Abelisauridae, and added Abelisauridae to Theropoda

Eric Walker added Tyrannosauridae, Aves and Abelisauridae and a number of links to Theropoda, and added Theropoda to Saurischia

Eric Walker added Theropoda and Sauropodomorpha to Saurischia, and added Saurischia to Dinosauria