@joelhern
On cosmic scales, time retains meaning but changes character.In standard cosmology, cosmic time serves as a universal clock for the expanding universe, measuring ~13.8 billion years since the Big Bang and ordering events like galaxy formation and CMB emission. General relativity allows this coordinate even amid spacetime curvature.However, at extreme scales—near the heat death in a forever-expanding universe—time loses practical significance. Maximum entropy eliminates usable energy gradients, halting change and erasing the arrow of time. Without events or distinctions, time becomes meaningless in any experiential or thermodynamic sense.Time exists formally, but nothing "happens" to mark it.https://en.wikipedia.org/wiki/Cosmic_time
https://en.wikipedia.org/wiki/Heat_death_of_the_universe
https://plato.stanford.edu/entries/cosmology
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