Sometimes a reader writes in with a letter of such transcendent comedic value that I've just got to share it with you.

Josh,

I would like you and your readers to keep open the possibility that the moon may in fact be made of cheese, or at least parts of it. The Apollo missions to the moon only covered a small fraction of the surface area of the moon, excluding large, unexamined areas that may in the future turn out to be made of cheese. Remember, absense of evidence doesn't mean absense of possibility.

-Paul S. [named omitted by editor]

Good point ...