Happy birthday to, among others, Far Side cartoonist, Gary Larson! In 1982 Gary did a Far Side cartoon in which a group of cavemen refer to the tail spikes of the stegosaurus as the "thagomizer" after the late Thag Simmons. A paleontologist at the Denver Museum of Nature and Science picked up on the term, and it has since been used as the informal anatomical term in displays at Dinosaur National Monument in Utah, in the book The Complete Dinosaur, and in the stegosaur display at the Smithsonian. Go Gary!
