Electrons are particles without internal pressure, because they are too dense to allow smaller particles to orbit through them. As such, they are not subject to evolve or change. All matter changes in time because of internal pressure fluctuation due to external pressure fluctuation or what I refer to as “universal respiration”, with the exception of the electron. As long as the electron orbits within its “orbital corridor” or “electron conduit”, it is a constant! All particles, with the exception of the electron, expand and contract.