The Piri Re'is Map

Most theories about ancient unknown civilizations are based on absolutely no physical evidence, usually just hearsay and speculation. What really would shake the basis of our knowledge of history would be an actual artifact. This probably wouldn't be something spectacular like finding a sunken city in the Atlantic, or armor-piercing bullets embedded in a dinosaur skeleton. It would probably be something that only an expert in the field would recognize as anomalous.More likely, this artifact would be a document or tradition from the past which reveals a deep understanding of some scientific fact recently discovered. This could be a description of the structure and function of DNA, knowledge of astronomy or physics which is only known to modern science . . . or accurate maps of the earth drawn long before the "Age of Exploration". The Piri Re'is map appears to be just that artifact. The Piri Re'is Map is only one of several anomalous maps drawn in the 15th Century and earlier which appear to represent better information about the shape of the continents than should have been known at the time. Furthermore, this information appears to have been obtained at some distant time in the past.