Photon declared champion

After a week of appreciation for each of the four particle contenders, the photon emerged as the winner in the Subatomic Smackdown. This week, four particles finished what they'd started. In February, the proton, photon, electron and neutron threw their hats into the ring for the Subatomic Smackdown. This month, they sparred at the open house for the National High Magnetic Field Laboratory in Florida. (The electron won.) They even held a press conference at a meeting of the American Physical Soc...