This massive, eight-symbol stone carving, measuring roughly 10 feet by 12 feet, has puzzled scholars for decades. Why did these Scandinavian-looking runes appear in this landlocked region of America, and who is responsible for creating them? For believers like Farley, the Oklahoma Runestone proves that Vikings sailed up the Mississippi River over 1,000 years ago. For others, the stone is an elaborate hoax with more modern origins.