> So you are saying, there is a semi-reversible process where energy and volume are correlated? My original objection was to you thinking of it as a "process",

> So you are saying, there is a semi-reversible process where energy and volume are correlated? My original objection was to you thinking of it as a "process", or at least a process involving energy and volume. It's a relationship between stress-energy and spacetime geometry. > Should there actually be some specific amount of energy in place in order this density-to-scale transmutation to happen? There is no such "transmutation". That's not what's going on. Your questions aren't answerable because they are based on false premises. At this point I've done my best to explain what is and isn't going on. All I can do is recommend reading more detailed treatments, which you can find in any cosmology textbook, or in briefer form in most GR textbooks. Sean Carroll's lecture notes on GR are available for free online [1], and Chapter 8 discusses the basics of our best current model of the universe in cosmology. [1] https://arxiv.org/abs/gr-qc/9712019 https://arxiv.org/abs/gr-qc/9712019