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19 of 20 from Inside the Large Hadron Collider (photos)
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The LHC, which fits into the underground tunnel used by an earlier accelerator at CERN, is 27 kilometers in circumference. For scale, the Geneva airport is at the far end of the circle in this shot and the Alps are in the distance.
July 6, 2010 4:00 AM PDT
Photo by: CERN
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