Five potential theories, all claiming to be the best approximation of the true string theory. That’s pretty awkward, but in the 1990s, physicist Edward Witten declared a winner: all of them.

String theory attempts to unify all forces and particles in the universe using vibrating strings. It aims to explain the Standard Model of particle physics, which is incomplete. String theory ...

The five main string-theory candidates may all just be pieces of a larger, cohesive whole — and M-theory could bring them together.

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It’s all atoms. So music is also a vibration — certain kinds of vibration make you feel good, and the combination of notes makes you react to it. It generally helps you relax and is healthy.