On April 1, 2004 a Wikipedia user discovered shocking proof — photographic proof — of water on Mars. The photograph was posted to the heart-laden article "♥Water on Mars♥" and the image is still retained (Creative Commons license and all) on Wikipedia, though it carries this bold warning: "This is a very bad joke. We believe it to be one of the most humorous examples of the Wikipedia community's work."
Read the full text here: http://mentalfloss.com/article/32286/11-bad-jokes-and-other-deleted-nonsense-best-wikipedia#ixzz2ICnowce2–brought to you by mental_floss!
apm65 