I am a sucker for those books that hypothesize that Earth was visited by extra-terrestrials in the distant pass. One artifact that is brought up in nearly all of them is The Piri Reis Map, a document that seems to be a map includes parts of the world (such as Antarctica’s ice-covered mountains) that were thought to be very recent discoveries. But, are they a hoax?
Go follow the links in the metafilter posting. They are very interesting 🙂 If you are done read Daniel’s moon hoax article.