Uploaded March 2023 | Updated September 2026, 1 day ago

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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 theory 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 make a universe in the lab?

Previous episodes in the series:

Is Time and Illusion? youtube.com/watch?v=aDM5PFMbty8
Is the Universe Fine-Tuned for Life? youtube.com/watch?v=HWnLqK6AOQU

Find out more at: qspace.fqxi.org

and at: theconversation.com/great-mysteries-of-physics-3-is-there-a-multiverse-202202

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