Has this been observed, or is it more: here's some math that makes entropy even possible because the alternatives sound unlikely? I'm betting on the weird, things like the universe being generative on a macro scale and entropic in local timespace, wherein dark matter is merely newly created matter not in another universe, but in this universe, maybe some unknown interactions between the unstoppable force of expansion and the immovable object of a black hole's gravity. I'm probably blathering, I'm not a physicist.