Or imagine it the other way around: The heat death has long started and we live in it. Who knows what kind of civilizations existed in the first quark gluon plasma 10^-12 to 10^-5 seconds after the big bang? They would have been tiny, fast and highly energetic. There are many orders of magnitude in size more between us and the plank length then between us and the observable universe. There’s lots of room down there. To them, we would seem like sluggish giants living off of tiny sparks within the faded light their long dead world set free when the universe became transparent 18,000 years after the big bang.
Or imagine it the other way around: The heat death has long started and we live in it. Who knows what kind of civilizations existed in the first quark gluon plasma 10^-12 to 10^-5 seconds after the big bang? They would have been tiny, fast and highly energetic. There are many orders of magnitude in size more between us and the plank length then between us and the observable universe. There’s lots of room down there. To them, we would seem like sluggish giants living off of tiny sparks within the faded light their long dead world set free when the universe became transparent 18,000 years after the big bang.