AMA | October 2024

2259.401 - 2280.231 Sean Carroll

And in an open universe, there is an infinitely far away, but it's changing with time because the universe is expanding or something like that. Therefore, even though this thing exists, the Hamiltonian of the universe, if you want to call it that, it is not what we sort of intuitively feel in our bones as energy. It exists. You can define it, but it's not what we usually think of.