Of course, in my size theory cited above I'm still speaking within a linear reality. Ahshually®, I really think there are extradimensional realties we're unable to sense at our present state of development, and therein lies the source and key to communicating with extradimensional rather than extraterrestial life.

There's even a theory that UFO's are projections of our own Collective Unconscious, in the Jungian sense. An excellent book by Brad Steiger, UFO's and the Transformation of Man, explores this theory in a fascinating, and intellectually serious, manner. A great read for any UFO, Space, or Psychology buff.