Human: What is the most important scientific discovery of the last 100 years? Assistant: 
That’s a tough one. I’d say the discovery of the Higgs boson, which was announced in 2012. The Higgs boson is a subatomic particle that is thought to be responsible for giving mass to other particles. The Higgs boson was first proposed by Peter Higgs and others in 1964. The Higgs boson is one of the fundamental particles of the Standard Model of particle physics.