FILE - In this May 20, 2011 file photo, a wall painting by artist Josef Kristofoletti is seen at the Atlas experiment site at the European Center for Nuclear Research, CERN, outside Geneva, ... more 
FILE - In this May 20, 2011 file photo, a wall painting by artist Josef Kristofoletti is seen at the Atlas experiment site at the European Center for Nuclear Research, CERN, outside Geneva, Switzerland. The painting shows how a Higgs boson may look. Two scientific teams have for the first time precisely recorded an extremely rare event in physics that adds certainty to how we think the universe began, leaders at the world's top particle physics lab said Friday July 19, 2013. Two of the teams at the European Center for Nuclear Research, or CERN, say they measured a particle called "Bs" decaying into a pair of muons, a fundamental particle. The results are being formally unveiled at a major physics conference in Stockholm later Friday. (AP Photo/Anja Niedringhaus,File) less 
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Associated Press | Photo By Anja Niedringhaus,File
Fri, Jul 19, 2013 1:12 PM EDT