The 15th century Vinland Map, the first known map to show part of America before explorer Christopher Columbus landed on the continent, is almost certainly genuine, a Danish expert said Friday.
Controversy has swirled around the map since it came to light in the 1950s, many scholars suspecting it was a hoax meant to prove that Vikings were the first Europeans to land in North America -- a claim confirmed by a 1960 archaeological find.
Doubts about the map lingered even after the use of carbon dating as a way of establishing the age of an object.
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