system
Given the following post, respond as if you're commenting on Reddit:
human
What happens to information after the heat death of the universe?

Presume the heat death is the ultimate fate of our universe. If so, my understanding is that there are no "nodes of lower entropy" to do work. Does this also mean that there is no way to tell one location from another? Wouldn't all points in space have the same particles at the same energy level? If so, wouldn't locality cease to be relevant? What about temporality? Ultimately, I am curious if this means that all of the information in the universe gets spread out uniformly. If so, wouldn't this annihilate the information (or make it irrelevant)?

TL;DR If you looked at some point and moment in/after the heat death, could you reverse the clock and reconstruct the universe as it was before? Or, is the heat death a kind of point of no return for information?
gpt
>TL;DR If you looked at some point and moment in/after the heat death, could you reverse the clock and reconstruct the universe as it was before? Or, is the heat death a kind of point of no return for information?

You could theoretically do this, but you would have to know literally every piece of information in the universe. In practice you never could because you can't measure all of that data without changing it, which is another way of saying that you're part of the universe. Clearly you couldn't store all of the data of the universe in a hard drive, because the hard drive doesn't have enough space to describe itself as well. 

The information is all still there, it just isn't usable because it's so scrambled. Every bit of energy interacts with everything near it and you'd have to keep track of the entire process in order to reverse the universe to a more usable state.