[BipolarBob]

Dilithium crystals are used in warp drives for acceleration of space ships. Just something to note.

[LibWhacker]

Lol, there you go! DiLITHIUM! You don't actually have to observe super-advanced aliens. After all, they're not so easy to observe if they don't want to be observed, as any UFO hunter can tell you... All you have to do is notice what's inexplicably missing throughout the whole universe and realize only one kind of "people" could possibly be capable of hoarding it all: the super-duper scary advanced kind. ;-)