I could be totally off with these ideas, but it seems to me that matter needs some way to move "through" space, and if the universe is expanding it needs something to create the new space. I'm thinking this is how the universe is "getting colder" and losing energy all the time. The energy is converted to space, and even matter converted to energy, then space.
I swear someone linked me to a known idea in physics about this, but I don't remember what it was, and I'm surprised by no one ever talking about it. It seems like this could answer what gravity is since gravity appears to "scrunch up" space itself, given that it can even suck in light.
Also, idk how light fits into this all. Maybe it's what the e=mc^2 idea says when you solve for c. Now I've never really understood what a particle wave is other than people saying it's a particle that provides it's own energy to float through space. I know that the c stands for the speed of light, not "light itself" but if light is related to mass and energy could this mean that c indicates light is "oscillating" between mass and energy? not sure then where entropy comes into play here as to what's being lost as light travels though (maybe it's secretly how light is distorted as it travels through space; as in the fact that it's not in a perfect vacuum traveling along is the thing that causes the demanded entropy?)
Anyways, are energy and matter not scrunched up space?