In Search of the Multiverse: Parallel Worlds, Hidden Dimensions, and the Ultimate Quest for the Frontiers of Reality by John Gribbin

Author:John Gribbin [Gribbin, John]
Language: eng
Format: mobi
ISBN: 9780470926581
Publisher: John Wiley and Sons
Published: 2010-08-12T16:00:00+00:00

It’s like the difference between two trains on the same track leaving a station in opposite directions, and two trains on the same track heading towards each other in opposite directions. What happens where the arrows meet in the middle? We know what would happen to the two trains; in order to avoid something equally messy in a bubble universe, time would have to reverse, instantaneously, everywhere in the universe at the same time. How does everything in the bubble universe know that it is time to reverse all the processes of thermodynamics? To take just a single, simple example, suppose that a single photon of light has just emerged from the surface of a star and is about to set off into the void when the universe reaches its maximum size. How can that single photon (along with every other photon in the universe) suddenly reverse its motion and head back in to the star from which it has just emerged?

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