<human>:  Who was the first person to propose the existence of the Higgs boson?
<bot>: The Higgs boson was first proposed by Peter Higgs in 1964. The Higgs boson is a hypothetical elementary particle that is thought to be responsible for giving other particles their mass. The Higgs boson was predicted to exist by the Standard Model of Particle Physics, which is a theory describing the basic particles and forces that govern the physical world. The Higgs boson was first observed in 2012, and was later confirmed in 2013.