11. The concept of alternative universes (proposed — Bill)

The con­cept of alter­na­tive uni­vers­es is a pop­u­lar top­ic in sci­ence at the moment. If an alter­na­tive uni­verse exist­ed, would it have dif­fer­ent phys­i­cal prop­er­ties to those of our uni­verse? Or would the phys­i­cal laws nec­es­sar­i­ly be the same?

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