Before I start, let me get something out of the way; light=radiation=pure energy, where all of these terms are mutually exclusive, right? So if its true to say that the universe is bathed in radiation due to the big bang and that the universe is expanding space wise, is it also true to say space can only exist while there is radiation running through it? or that the radiation at the edge of the universe creates space as it permeates away from the center of the universe? At the risk of sounding too bizarre, I wonder if there's a correlation here to matter diffraction. If radiation isn't present, massive particles will superimpose all over the place.. so is light light is necessary for structure in this sense?