This description covers the discovery of the Higgs boson, a subatomic particle that is believed to be responsible for giving mass to all other particles in the universe. In 2012, the discovery of the Higgs boson was announced by scientists at the Large Hadron Collider (LHC)
From Wikipedia
The search for the Higgs boson was a 40-year effort by physicists to prove the existence or non-existence of the Higgs boson, first theorised in the 1960s. The Higgs boson was the last unobserved fundamental particle in the Standard Model of particle physics, and its discovery was described as being the "ultimate verification" of the Standard Model. In March 2013, the Higgs boson was officially confirmed to exist.