Is it a cosmic string or are we seeing double?


By Marcus Chown THE case for the existence of cosmic strings has just been boosted. If confirmed, these one-dimensional threads of energy that can span millions of light years could be the first sign of extra dimensions in the universe. Cosmic strings are predicted by string theory. They are gigantic counterparts of the strings that are thought to give rise to the fundamental particles of matter. String theory suggests that our universe may be a three-dimensional island, or “brane”,
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