Okay, so I'm just looking at this from a limited nuclear engineering scope: We know that as far as gamma interactions go, in pair production, a photon is converted into a postitron and a electron. So it goes from being light, and having no mass, to suddenly having mass! Mass appears almost 'out of nowhere.' It comes from the massless photon. So, if this is a natural phenomenon, what if we harnessed this idea: Let's make it work backwards-- let's convert matter to light, beam it wherever, and have the memory of the computer reassemble it and convert light back to matter! And if theoretically, this were possible -- what would the implications be? If a human was converted to solely photons and reconverted back to human, would the heart still be beating and the consciousness still exist?