Funny, that seems like an obscure title, but in fact it’s accurate. Cectic is a skeptical web comic. Pareidolia is the human predilection to see faces in random patterns. Recently, Cectic did a comic on pareidolia:

Click it to see the rest (somewhat marginally NSFW and bound to offend some folks). It’s a pretty handy checklist, in fact, for those disposed to thinking that the face they see is anything more than a stain, wood grain, or hair pattern.