The idea of parallel dimensions has long intrigued scientists and screenwriters alike, but how seriously should we take the concept? Here with some guidance is Paul Halpern, author of the 2023 book The Allure of the Multiverse: Extra Dimensions, Other Worlds, and Parallel Universes. Paul is a professor of physics at Saint Joseph’s University and the author of eighteen popular science books. He’s the recipient of a Guggenheim Fellowship and is a Fellow of the American Physical Society.

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