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Could space have dimensions beyond the three that we all know and love? Some theories in particle physics speculate that it might, although these dimensions would be curled up in loops so small, they could probably be probed only in high-energy particle collisions. Now, however, one theorist suggests that, at least in principle, these hypothesized dimensions might reveal themselves in another subtle way. If there are extra dimensions, then the gravity from the black hole in the center of our galaxy might dramatically brighten the images of stars beyond it. Others see problems in making the scheme work, however.

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Category: Science