We understand something about energy in that its both a wave and a particle. We also know that time and space are connected in a deep way, and that time is not as smooth as it seems. So the time that we (and our tools) experience as sensory beings, should surely be both wave and particle like. And if time was particulate in some way (as the evidence would suggest), then its particles would have a minimum 'size', like the Plank 'size'. Given that hypothesis, there would have to be a limit on maximum velocity, given the nature of time. Lets be colloquial and call it "the speed of light". What we do know about light is that it has a direct nature for something with such a wavy character. If it was purely particulate, human vision of physical objects would compromised. So we know that the photons that hit our eyes (or our detectors) have travelled what can only be a straight path. But we know from Youngs experiment (et al) that light dissipates like a wave that could end up connecting to the first detector it comes across. I suspect that if we really look at it, we live in a dimensional pit where we think that forwards,backwards, up, down etc, represents some kind of totality. If there really is a limit on velocity in this lower 'superdimension', as there seems to be, how long will it take us to also understand that just as zero point energy is an escarpment we live on, there are other escarpments and tiers we know very little about at present ?