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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.