Photo Gallery: Finding the Missing Particle
12/20/2011
On July 16, 1964, Peter Higgs had an idea. He came up with a mathematical...
Science Photo Library

On July 16, 1964, Peter Higgs had an idea. He came up with a mathematical formula that explained why particles have mass. The only thing missing was the subatomic particle his theory posited. Now, scientists at CERN in Switzerland believe they may have found it.