Please explain what the Piri Reis map is.
It's an old map used by a Turkish Admiral before the discovery of Antarctica.
URL. Unfortunately for historians, it shows part of the coastline of Antarctica, and what's more, the coastline is shown ice-free. If you look at the map you might or might not agree. It has been suggested that it was a redraw of some truly ancient maps, which was a common thing to do if you had some truly ancient maps.