AMA | October 2024

2346.672 - 2366.181 Sean Carroll

That means that relevant to the stuff in the universe, things are not the same. from moment to moment in time. They are more dense in the past, less dense in the future, et cetera. And therefore, Noether's theorem, by the standards of Noether's theorem, there is no time translation of variance in an expanding universe, because the universe is changing. That's it. Simple as that.