Uploaded January 2021 | Updated September 2026, 3 weeks ago

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What do String Theory (M Theory), Brane Theory, and His Dark Materials have in common? Parallel Dimensions!
In this Bad Answers episode, Fad23 asked "How do a multiplicity of spatial dimensions work?" Astra talks higher-dimensional travel, parallel universes, and String Theory. Note that none of this is experimentally verifiable, and is therefore more thought experiment than science at the moment.

CORRECTION: The creator of our animated intro was Joe Karamanski.

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Sources and further reading:
youtube.com/watch?v=63GoTXe3Bjw
youtube.com/watch?v=YoJ5BRghuAk
youtube.com/watch?v=3KC32Vymo0Q
phys.org/news/2014-12-universe-dimensions.html
phys.org/news/2014-12-universe-dimensions.html
edge.org/conversation/lisa_randall-theories-of-the-brane-lisa-randall
societyofmodernastronomy.wordpress.com/2016/10/22/string-theory-part-8-hidden-dimensions

Image Sources:
HBO's "His Dark Materials" based on the book "His Dark Materials" by Philip Pullman
Parallel Universes Image: Star Trek: Discovery
Penicillin: LEONARD GERTZ
1930s: U.S. National Archives and Records Administration
Ant on a String: http://www.math.brown.edu/tbanchof/STG/ma8/papers/dstanke/Project/Superstrings.html
string 3D: brilliant.org/wiki/string-theory