Grand unification theory
Grand unification theory or GUT is a model that tries to describe the universe. It was formed by combining three forces - electromagnetic, weak and strong forces. These are three of the fundamental four forces of nature, which are responsible for all of the pushes and pulls in the universe. If gravity is also combined with these forces, then the GUT will become the proposed Theory of Everything.
Because GUT models have more dimensions than currently known, there has not been a single GUT. Particle accelerators, like the Large Hadron Collider have been built to test these GUTs indirectly, as it is too complex to be have noticeable effects on particle.
GUT was first proposed by researchers from CERN in the 1970s. The discovery of the Higgs Boson and other such recent discoveries will get scientists closer to knowing which GUT is correct, and ultimately know the Theory of Everything.