Einstein predicts two types of time dilation, both of which have been tested and confirmed. One is…
Modern physics has demonstrated that electron orbits are confined to specific regions around the atom. There are regions where the electron is likely to be found, and there are regions where the electron is extremely unlikely to be found. This can all be calculated using a wave function called the Schrödinger equation.
This is well described in this YouTube video, but the exact reason for this behaviour is still a matter of debate. Having dismissed the existence of an aether, many have concluded that the electron must be both particle and wave. However, this interpretation is coming under increasing pressure. The aether is having a comeback, this time as a dense fluid through which particles travel. Such an aether would produce pilot waves around electrons, confining them to the various regions defined by Schrödinger’s equation.
The success of Schrödinger’s equation in practical physics is not proof that particles have wave properties. Rather, it’s pointing towards the existence of an aether with the properties of a fluid that provides every particle with a pilot wave corresponding to its size, speed and direction of motion.