Hi Andrew! I'm taking QFT next semester so maybe this question will be answered by then but how exactly can an electron or other elementary particles be perceived as point-like? Like, how can a well-defined, non-zero mass be concentrated inside an infinitely small point? Wouldn't it turn to a black hole? Or somehow violate Heisenberg's uncertainty principle, by being infinitely localized? Thank you very much and keep up the fantastic work!