Unified Theory of the Classical Fields of Gravitation and Electromagnetism:
After the publication of the general theory of relativity in 1916, Albert Einstein tried to establish a unified theory of the classical fields of gravitation and electromagnetism. Although he published many attempts on the subject until 1955, it is sadly wise to say that he did not succeed.Grand Unified Theory:
One of the biggest goals in physics today is to unify the strong, weak, electromagnetic, and gravitational forces into one unified force, or what physicists call the "Grand Unified Theory". It has already been discovered that at high enough energies, electromagnetism and the weak force are the same force, known as the electroweak force. It is theorized that if energies are increased even further, all the known forces will boil down into the same force. If the standard model can be simplified in this way, it may lead into areas of further study in order to get a better grasp of the world around us.