From StarTalk.

Theoretical physics explores extra spatial dimensions and the limitations of time travel, but preserving causality remains a fundamental constraint in viable models. Multiple time dimensions, while fascinating, generally break the rules that make our universe logically consistent.

From ‘Is The Universe Made of Tiny Vibrating Strings? With Lara Anderson:’ https://youtu.be/fplTT3IrxDw?si=Zas4TljjmZtrkUhF

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