https://www.mentalfloss.com/culture/folklore-mythology/the-invisible-string-theory-explained
This is certainly a different kind of string-theory.
https://people.com/what-is-the-invisible-string-theory-11701526
https://www.mamamia.com.au/what-is-invisible-string-theory
https://www.reddit.com/r/donniedarko/comments/1r8xvji/theory_about_the_nature_of_tangent_universes