The boundaries between individual universes

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Many scientists propose the existence of multiple universes, with M-Theory suggesting as many as 10^500. The discussion centers on the concept of boundaries between these universes and what defines where one ends and another begins. Some participants suggest that these boundaries may exist in a hyperspace continuum that is not directly observable within our own universe. Brian Greene's book "The Hidden Reality" explores these ideas in depth, offering insights into the nature of these boundaries. The conversation highlights the complexity and intrigue surrounding the multiverse theory.
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Many scientists believe that there are many universes. The M-Theory states that there are 10500universes. If that is true. What is the "boundary" between them. In other words, the place where one universe ends and another universe starts, what is that like. I know this the most stupid question that's ever been posted in PF but still, please share your views on this topic.
 
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"The Hidden Reality", latest book by Brian Greene, discusses this subject in all its gory detail. It's a fun read.
 
Mdmaaz, in my cosmology, the only boundaries are in the hyperspace continuum that supports the actual spaces (like the one we're in), but is not directly detectable within those spaces.
 

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