I've heard they have some rather wacky history. I vaguely remember, but something around the lines of human beings being put on earth by a spaceship that's an exact replica of 7-47 (or something like it), then blowing us all up with a hydrogen bomb, then (no explanation as to why there's people left) brainwashing the populace with a giant movie..... yeah, I just read it off wikipedia, though the article's changed now so I don't know what the deal is.