Piri Reis map

Turkish historians discovered an old map in a Palace in 1929. The map was imprinted on an old animal skin and dated 1513. Here comes the mystery, the map apparently depicted large part of the Atlantic ocean, including the America's as well as Antarctica. According to history books, Antarctica was not discovered till 1818. One of the mystery surrounding this map is its accuracy, so accurate was the map that experts from the US air force in the 1960's used it to replace false information on their own charts. The continent of Antarctica was not mapped till 1949 by a British-Scandinavian group using modern day equipment to scan under mile-deep ice. Some experts suggest that Antarctica was ice free around 6,000 years ago