**FILE** A physicist explains the Atlas experiment on a board at the European Center for Nuclear Research outside Geneva on May 20, 2011. The illustration shows how a Higgs boson, an elusive sub-atomic particle, may look like in Atlas. (Associated Press)

Photo by: Anja Niedringhaus

**FILE** A physicist explains the Atlas experiment on a board at the European Center for Nuclear Research outside Geneva on May 20, 2011. The illustration shows how a Higgs boson, an elusive sub-atomic particle, may look like in Atlas. (Associated Press)