Secrets of the universe, found underground
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Scientists look at computer screens showing traces on the Atlas experiment of the first protons injected in the Large Hadron Collider (LHC) during its switch-on operation at the Cern's press center on Sept. 10, 2008 near Geneva. Physicists fired up the world's biggest atom-smasher in a mission to answer some of the most perplexing questions about the nature of the universe.
FABRICE COFFRINI/AFP/Getty Images
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