Many scientists devoted themselves to the fission process. Julius Robert Oppenheimer and Marie Sklodowska Curie are outstanding contributors in this area. They successfully implemented the fission process to obtain enormous energy. Nuclear fission is a nuclear reaction in which the nucleus of an atom splits into smaller parts. Most fissions are binary fissions, but occasion-ally there can be three positively charged fragments produced in a ternary fission. Nuclear fission produces energy for nuclear power and to drive the explosion of nuclear weapons. Nuclear reactors are the major source of human-generated neutrinos. The amount of free energy contained in nuclear fuel is millions of times the amount of free energy contained in a similar mass of chemical fuel such as gasoline, making nuclear fission a very tempting source of energy. Most of the energy produced in supernovas is thus radiated away in the form of an immense burst of neutrinos.