According to Quantum Physics (assuming I've interpreted what I've been reading correctly) energy and matter are the same thing. An object is either in waveform (non-physical) , or is in its material form, e.g. an electron. When it is in waveform its whereabouts can be anywhere and everywhere, e.g. a thousand light years away. It is only by observing it that it 'becomes', or 'turns' into something observable and has a location. I guess I'm really asking, does that which is non-phycial have a 'shelf lif?.