String theory requires more than the usual three spatial dimensions and one time dimension; it posits the existence of extra, curled-up spatial dimensions unseen at macroscopic scales.
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Relativity predicts that time passes slower for objects moving faster relative to a stationary observer – a phenomenon known as time dilation.
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String theory requires more than the usual three spatial dimensions and one time dimension; it proposes the existence of extra, curled-up spatial dimensions that are too small to observe directly.
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Some superconductors, when cooled below their critical temperature, exhibit the Meissner effect, completely expelling magnetic fields from their interior.
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