"The Native Americans called them Thunderbeast......They would Stampede across the great plains and the ground would shake............IS THEIR A BOOK....." What tribe are you speaking of??? To say Native Americans is a false statement as we are not all alike, we have different Creation stories, different languages, beliefs and traditions. If this is difficult to comprehend, are the English, Iranians, Greek and Italians all alike? Also, I think you mean "There rather than Their".