Which was the fastest, the biggest, the deadliest? Check out the greatest record breakers in history: the dinosaurs Dinosaurs ruled the Earth for millions of years--and they still rule the record books That's because they had to be extreme to survive in those prehistoric days. So meet the creatures that have never been equaled: Edmontonia, the spikiest dinosaur; Laellynasaura, with the longest tail ever; Therizinosaurus, a super slasher with killer claws; Fruitadens, the smallest plant eater; and many more. In addition to the fun facts and figures, there's amazing CGI artwork, a timeline, a box that compares each dinosaur's size to a human's, and information on who named the dinosaur. New format of Dinosaur Record Breakers for a younger audience.