Location : Africa

Imagine a Diplodocus with a huge sail on its back and you have Rebbachisaurus. This is what some scientists think this dinosaur looked like. It isn't the only long-necked dinosaur to have a sail-like structure on its back, but it seems to have had the largest - its sail was over 5 feet (1.5 m) tall!

There is still much controversy over this specimen, as some scientists don't believe that all of the species should be classified in this genus. Some suggest it was closely related to Jobaria  . It had broad, spoon-shaped teeth, massive claws on heavily built back feet, and it may have had a long, whip-like tail.