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Scientists look at a screen at the European Organisation for ...

Mon Nov 23, 12:53 PM ET

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Scientists look at a screen at the European Organisation for Nuclear Research (CERN) data quality satellite control center of the ATLAS detectors during the restart of the Large Hadron Collider (LHC) in Meyrin, near Geneva, Switzerland, Monday, Nov. 23, 2009. Scientists turned on the Large Hadron Collider on Friday night, Nov. 20, 2009, for the first time since the machine suffered a failure more than a year ago and had to be shut down shortly after the start.

(AP Photo/Keystone, Laurent Gillieron)