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markmevans t1_j4dee1x wrote

Reply to comment by 3SquirrelsinaCoat in The multiverse by Manureofhistory

That’s a different multiverse theory where different areas of a potentially infinite cosmos have different laws of physics. I believe the OP is referring to the Everettian multiverse where instead of the wave function collapsing the cosmos “branches” into multiple universe. In this model the laws of physics don’t change.

It rubs people the wrong way for various reasons, mostly because a huge number of universe seems unreasonable.

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danielravennest t1_j4dsau4 wrote

There is yet another idea based on string theory. It proposes that the universe has more than 4 dimensions, but the additional ones are "rolled up" to quantum size. It would be possible that different sets of four out of ten dimensions exist, with different ones rolled up. These universes would be "perpendicular" to ours and thus unobservable.

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