Explained: Higgs boson 'God particle'
Physicists celebrate evidence of particle
Credit: AFP/Getty Images
Visitor to the CERN watch a projection at 'Universe of Particles' exhibition on December 13, 2011 in Geneva. Scientists at the CERN are expected to give an update on their search for the Higgs boson, a elusive subatomic particle that is believed to be a basic building block of the universe, at the Large Hadron Collider (LHC) the world's largest atom smasher. AFP PHOTO / FABRICE COFFRINI (Photo credit should read FABRICE COFFRINI/AFP/Getty Images)
