The Hidden RealityThe newest discoveries about multiverses from the best writer in the field There was a time when 'universe' meant all there is. Everything. Yet, as Brian Greene's extraordinary book shows, ours may be just one universe among many, like endless reflections in a mirror. He takes us on a captivating exploration of parallel worlds from a multiverse where an infinite number of your doppelg ngers are reading this sentence, to vast oceans of bubble universes