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TagEternal Inflation cosmology

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Face in multiverse

Sabine Hossenfelder Asks, Is the Multiverse Science or Religion?

Or pseudoscience? The no-nonsense theoretical physicist reveals a gift for comedy as she tries to explain theories that place no constraints on what can happen

Some science controversies arise in disputes over findings. The current flap over the James Webb Space Telescope data, for one. Others sound like clashes over philosophy — claims about the multiverse (countless universes out there) are a good example. Theoretical physicist Sabine Hossenfelder takes on the multiverse in in her new book, Existential Physics: A Scientist’s Guide to Life’s Biggest Questions (2022). She also addresses the topic concisely — and wittily — in a short video and a blog post at Back(Re)Action. She looks at three popular multiverse models: Many Worlds, Eternal Inflation, and String Theory Landscape. Here’s her take on Eternal Inflation: We don’t know how our universe began and maybe we will never know. We just talked about…