There is a theory that there is only one electron in the whole universe. Why?
The theory that the universe has only one electron was brought up by the physicist Richard Feynman in a lecture. After winning the Nobel Prize in Physics in 1965, he discussed a theory that supposes there is only one electron in the entire universe!
The alleged sole electron in all of existence, in theory, is always traveling through space and time. In doing so, it creates the appearance that it is present in many locations at the same time.
As surprising and unusual as that may seem, there are some thought-provoking reasons behind the formulation of that idea. It all goes back to a telephone conversation between Feynman and fellow physicist John Wheeler, a professor at Princeton and thesis advisor to Feynman.
The notion that there is only one electron was an attractive idea, because it provided an answer to a problem that had been puzzling scientists for some time, which was the mystery of why all electrons have the same charge and the same mass. John Wheeler offered a simple solution when he declared, “Because, they are all the same electron!”
Later in his lecture, Feynman clarified that he did not readily embrace the theory, saying that he did not take it as seriously as other theories and observations.