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Russell's Teapot
Anyway how can there be other universes, I thought the universe pretty much meant everything. Even If there were other large collections of bodies of matter, trillions of light years away, they would still be in our universe.
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Other universes would not be any distance away at all. They would have distinct spatial dimensions (and perhaps ages and physical laws) so they cannot be reached in any direction. They are something else entirely from our universe, words like "somewhere" or "somewhen" don't apply.