Have you ever heard of M theory?

Question

If so please give me your interpretation. Thanks !

Answer 1

In theoretical physics, M-theory is a mathematical proposal that unifies the five ten-dimensional superstring theories as limits of a single 11-dimensional theory. Though a full description of the theory is not yet known, the low-energy dynamics are known to be supergravity interacting with 2- and 5-dimensional membranes. This theory is the unique supersymmetric theory in eleven dimensions, with its low-energy matter content and interactions fully determined.

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