My third submission to the Archive of Formal Proof has been published yesterday: A proof that there exists exactly one general triangle. Given that yesterday was the first of April, this is obviously not meant too be taken too serious; nevertheless it is not a prank either: The math is sound and now even formally verified using Isabelle.
Have something to say? You can post a comment by sending an e-Mail to me at <mail@joachim-breitner.de>, and I will include it here.