Could be ice in Antarctica comes and goes much faster than scientists seem to think. Or at least some of the ice.
The Piri Ries map is thought to be a fake, a d yet....
I don’t think the Piri Ries map is a fake. I just think he ran out of room to draw the rest of the South America coast, so he flipped it and started drawing it along the bottom of the page.
No, it's not a fake. Admiral Reis actually did exist, and was a prominent map-maker in the Turkish Navy.
The Naval Museum in Istanbul has a replica of the Piri Reis map of the New World on the front of the building. It also has a room dedicated to the Admiral. It contains period maps and instruments of the type he would have used. I was never able to get clear whether they were actually his instruments, or simply typical instruments of the period in which he worked. It was quite clear, though, that he was very competent, and his maps of the Mediterranean were accurate.
However, despite the best that could be done by sixteenth-century cartographers, it wasn't until the 1950s that the US Air Force, using electronic navigation aids, was able to tie together the 30th Meridian between Europe and Africa.
Having done some extensive research on a variety of related topics, I’ve found that anything (including the Piri Reis map) that contradicts the opinions of the archaeological community is almost universally characterized as a fake - even if the so-called fake is 500 years old and fairly accurate in every other respect.