Space-Time :: The Biggest Problem in Physics

What is the deepest level of reality?
In this Quanta explainer, Vijay Balasubramanian, a physicist at the University of Pennsylvania, takes us on a journey through space-time to investigate what it’s made of, why it’s failing us, and where physics can go next.
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Original video: https://youtu.be/RIqVnFtOSr4

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