The Nature of Extra Dimensions and String Theory

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In quantum gravity, the concept of the size of extra dimensions or their dimensionality may not exist. Near the Big Bang, the dimensions of space-time remain unknown. Brandenburger and Vafah proposed a scenario where all nine dimensions were compact and small, suggesting that strings in three dimensions intersect, unlike in four or more dimensions where intersections are rare. This led to the theory of three-dimensional space growing as strings unwound due to frequent intersections, known as the Brandenburger-Vafah cosmology scenario.

Welcome to the June 2024 Ask Me Anything episode of Mindscape! These monthly excursions are funded by Patreon supporters (who are also the ones asking the questions). We take questions asked by Patreons, whittle them down to a more manageable number -- based primarily on whether I have anything interesting to say about them, not whether the questions themselves are good -- and sometimes group them together if they are about a similar topic. Enjoy!

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Blog post with show notes, questions, and transcript: https://www.preposterousuniverse.com/podcast/2024/06/03/ama-jun-2024/

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