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As I understand it, one theory of the multiverse is that there are an infinite number of universes separated by small distances in other (than our observable 3/4) dimensions and that gravity is weak because it permeates these other dimensions.

But if there are an infinite number of these universes then surely the gravitational force we would feel would be infinite?

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Perhaps you can link to the sources of your information, so we can better explain them to you. –  Jeremy Jul 2 at 21:04
    
Do multiverse theories say that there must be an infinite number of universes? –  HDE 226868 Aug 6 at 18:26
    
Some do, certainly –  adrianmcmenamin Aug 9 at 19:47
    
Right, but not necessarily all. What specific theories say that there must be an infinite number of universes? –  HDE 226868 Aug 9 at 20:25
    
Well, eternal inflation is one, infinite brane cosmologies are another –  adrianmcmenamin Aug 10 at 18:06

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