Peter Higgs, the Nobel prize-winning physicist who proposed the existence of the Higgs boson, has died at the age of 94. Higgs' theory, proposed in 1964, explained how particles acquire mass and was later confirmed by experiments at the Large Hadron Collider in 2012. He was awarded the Nobel Prize in Physics in 2013 for his work. Higgs spent most of his professional life at Edinburgh University, which established the Higgs Centre for Theoretical Physics in his honor.