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Loop Quantum Gravity
ConceptMentioned in 2 videos
A theory that attempts to unify general relativity and quantum mechanics by quantizing spacetime itself, suggesting it is composed of discrete loops.
Videos Mentioning Loop Quantum Gravity

What If Space And Time Are NOT Real?
PBS Space Time
A theory that attempts to unify general relativity and quantum mechanics by quantizing spacetime itself, suggesting it is composed of discrete loops.

The String Theory Wars and What Happened Next
Sabine Hossenfelder
An alternative approach to quantum gravity that Lee Smolin supported, but the video suggests it was not progressing.