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String theory attempts to unify general relativity and quantum theory. Popular in the 1990s, string theory fell out of favor as it failed to provide testable predictions and required ten dimensions ...

Artwork illustrating how string theory emerges from a few simple mathematical assumptions about particle collisions. Credit: AI-generated art by Clifford Cheung. Physicists searching for a better ...

Physicists may have uncovered a surprising new clue that string theory—the idea that the universe is built from unimaginably tiny vibrating strings—could be more than just a mathematical fantasy.