We may exist in all universes, but 'hear' only one because of our limitations, the valve of our desires, our practical, physical needs. All is vibration, with nothing vibrating across no distance whatsoever. All is music. A universe, a world, is just one long difficult song. The difference between worlds is the difference between songs.
Greg BearIt's kind of a misnomer about science fiction that science fiction is about anything other than people. It's about people doing stuff, sometimes doing extraordinary stuff.
Greg Bear