A skull found in Norway possessed a peculiar deformity, which enabled scientists to determine that is was Andean-Incan, from about 1050 AD. The conjecture is that Vikings sailed to Peru, and carried off the Indian-maybe willingly- back to Norway. This proves that Vikings explored most of the Americas, and not just parts of the northeastern coast. (The Incan was formally buried, with honors, among other leading Vikings-leading to speculation that he was an friend to the Norsemen).