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Calabi-Yau (called in the names of two mathematicians (Eugenio Calabi) and (Shing-Tung Yau )) spaces may be that microscopic shape, deep inside the hidden dimensions of string theory. According to string theory, space-time isn't 4-dimensional as you might expect, but 10-dimensional. Where are the extra six dimensions? One answer is that they're "compactified": roughly speaking, rolled up into such...read more