Miriam Frankel explores the multiverse with physicists Andrew Pontzen, Katie Mack and Sabine Hossenfelder in part 3 of Great Mysteries of Physics, FQxI's podcast series produced by The Conversation.

The Many Worlds interpretation of quantum mechanics posits one type multiverse of parallel universes, while some cosmological models suggest others. But is the idea of a multiverse even scientific? Miriam discusses attempts to find evidence of neighbouring universes in the relic radiation of the big bang—and also the criticism that ultimately the idea of a multiverse is not testable and thus not scientific. And could we even make a universe in the lab?

Explore more:

• Mitch Waldrop's in-depth report on Cosmological Origins.
• Miriam on the multiverse at The Conversation.
• Can we create a universe in the lab? Buy Zeeya Merali's book, A Big Bang in a Little Room: The Quest to Create New Universes.
• Buy Katie Mack's book, The End of Everything.
• Buy Sabine Hossenfelder's books, Existential Physics and Lost in Math .
• Episode 1 of Great Mysteries of Physics asks: Is Time an Illusion?
• Episode 2 of Great Mysteries of Physics asks: Is the Universe Finely-Tuned for Life?

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