I'm sure that you know that David Icke has posited that as humans we experience only a sliver of reality, for example our vision and hearing can pick up only a very small portion of the light and sonic wavelength spectra. I agree that there could easily be a lot of things out there that we may experience only when we alter our own capability of perception. I've been fascinated with the idea since seeing "Flatland" as a child, which makes the idea of "more than three dimensions" virtually a certainty rather than a musing.