Diplodocus may have called prehistoric North America home, but there’s not much about his world that’s similar to ours. Diplodocus, which means double beam, is named after its bones. It knew how to fight off predators with a tail whip that was moved at 800 miles per hour! These fascinating creatures lived interesting lives long ago, and readers will love learning about them with the help of fantastic illustrations that show us just what these animals looked like.