http://antwrp.gsfc.nasa.gov/apod/ap060401.html
It seems that NASA has the same goofy humour as Google. Must be a geek thing. (Thanks, Gu1tar for the Stumble!)
Using the new camera on the Hubble Space Telescope, astronomers have been able to confirm that the Moon is made of green cheese. The telling clue was the resolution of a marked date after which the Moon may go bad. Controversy still exists, however, over whether the date resolved is truly an expiration date or just a “sell by” date.