The American Cheetah was Cheetah-like animal that lived in North America. When they first found the American Cheetah, paleontologists classified it as a Cheetah. But while the American Cheetah was built like a Cheetah, it had the retractalbe claws of a Cougar. That was what got the debate on whether the American Cheetah should be classified as part of the Cheetah family or if it was related to the Cougar, kind of like the debate on Tyrannosaurus and Nanotyrannus. Recently, DNA tests revealed that the American Cheetah was more closely related to the Cougar.