Five multiverse theories - Sabine Hossenfelder (video)

Part one is introductory - opinions next installment

INTRO: You are one of some billion people on this planet. This planet is one of some hundred billion planets in this galaxy. This galaxy is one of some hundred billion galaxies in the universe. Is our universe the only one? Or are there other universes? In the past decades, the idea that our universe is only one of many, has become popular among physicists. If there are several universes, their collection is called the “multiverse”, and physicists have a few theories for this that I want to briefly tell you about.


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