>(including now that I think about it, inside of atoms, which could cause some weird stuff???). If the distance between electrons and protons were expanding ov

>(including now that I think about it, inside of atoms, which could cause some weird stuff???). If the distance between electrons and protons were expanding over time, that would be hard to square with quantitized energy levels for electron orbitals. Not sure if you could get around having material and chemical properties changing over time.