Now, I'm all for dinosaurs having high self esteem. But there's no way around it: Carnotaurus was one ugly lizard. We're talking bony horns over its eyes, a stocky build, and arms so puny they make T-Rex's look like a boxer. But what Carnotaurus lacked in the looks department, it made up for in badassery. The muscular build suggests this dinosaur was a real sprinter, and its arms probably shrunk because it attacked its prey with its tough head and neck, like a bull. So if you run into one, laugh it up, but know that it's your last laugh. Artwork by