Most important finding in the 21st century. “God Particle” is the nickname given to Higgs Boson. And it’s one of subatomic particle.
The Higgs boson is considered to give particles their mass. Since matter is defined as anything which occupies space and has mass, the Higgs Boson can be Considered as the second fundamental constituent of the universe after blank space itself. Hence the name ‘God’ particle.