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St. Paul, Minn.

Imagining the fate of the universe

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Parallel Worlds
The cover of "Parallel Worlds: A Journey Through Creation, Higher Dimensions, and the Future of the Cosmos," by Michio Kaku
Photo Courtesy of Random House
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Parallel Worlds
The cover of "Parallel Worlds: A Journey Through Creation, Higher Dimensions, and the Future of the Cosmos," by Michio Kaku
Photo Courtesy of Random House