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Is the Universe on the outside or inside?

  1. Nov 29, 2011 #1
    Specifically, does our Universe exist on the inside "skin" of a bubble or the outside "skin" of a bubble? I'm sure this has something to do with M-Theory or brane cosmology, right? I'm curious.
  2. jcsd
  3. Nov 29, 2011 #2


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    Gold Member

    I think in the normal cosmological model those are nonsensical concepts. There may be totally unverified hypotheses that posit some models in which those concepts have meaning, but I think of them as Science Fiction. They MAY become science fact, but not yet.
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