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| Cycles of time
Roger Penrose | Bodley Head, 2010 | ISBN: 9780224080361
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What happened before the big bang?  The idea of cyclic universes has a long history, but didn't seem to fit with what we know about the universe.  Now, in Cycles of Time: An Extraordinary New View of the Universe   Roger Penrose explains a new idea of how the end of one universe could be the start of another.
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