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multiverse
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multiverse

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Written by
Anthony Aguirre
Professor, Department of Physics, University of California, Santa Cruz.
Anthony Aguirre
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cosmology

multiverse, a hypothetical collection of potentially diverse observable universes, each of which would comprise everything that is experimentally accessible by a connected community of observers. The observable known universe, which is accessible to telescopes, is about 90 billion light-years across. However, this universe would constitute just a small or even infinitesimal subset of the multiverse. The multiverse idea has arisen in many versions, primarily in cosmology, quantum mechanics, and philosophy, and often asserts the actual physical existence of different potential configurations or histories of the known observable universe. The term multiverse was coined by American philosopher William James in 1895 ...(100 of 1458 words)

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