On 21 December 2013 22:18, Bruno Marchal <[email protected]> wrote: > > On 20 Dec 2013, at 18:48, Richard Ruquist wrote: > > Bruno: In that case a multiverse could contain another multiverse, a bit > like a black hole could be a door to another universe. > > Richard: I like that idea because Smolin hypothized and Poplawski > confirmed using GR + spin that black holes yield at least an internal > universe. > > Interesting. Wish I could follow this more closely. > > I think this is shown by the Penrose diagram of a rotating black hole, if I remember correctly. I certainly wrote a science fiction story on that basis once!
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