AMA | October 2024

12009.679 - 12032.795 Sean Carroll

So for things like the speed of light, the mass of the electron, Newton's gravitational constant, it would be super duper important physics discovery to actually detect them changing over time. So of course people have tested that and there's all sorts of ways to test it. My favorite way is big bang nucleosynthesis. You know, when the universe was one minute old, it was a nuclear reactor.