10^500 Possible Universes!!

"The original hope of physicists to produce a single theory explaining the apparent laws of our universe as the unique possible consequence of a few simple assumptions may have to be abandoned. Where does that leave us? If M-theory allows for 10^500 sets of apparent laws, how did we end up in this universe, with the laws that are apparent to us? And what about those other possible worlds?" from The Grand Design by Stephen Hawking.

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