FAS Astronomers Blog, Volume 31, Number 13. As noted in An Introduction to Dinosaurs, Richard Owen (Owen 1842) created the designation Dinosauria meaning “Fearfully great lizards” or “terrible lizards” to describe the new found dinosaurs. Dinosaurs lived during the Mesozoic era and dominated the planet in the Jurassic and Cretaceous periods. In 1887, Harry Seeley…