In his famous talk "A Universe from Nothing", Lawrence Krauss makes the same point, if slightly less definitively. ("We may never know", and that's okay - http

In his famous talk "A Universe from Nothing", Lawrence Krauss makes the same point, if slightly less definitively. ("We may never know", and that's okay - https://www.youtube.com/watch?v=7ImvlS8PLIo https://www.youtube.com/watch?v=7ImvlS8PLIo) By analogy he describes how, due to the expansion of the universe, Milky Way residents 100 billion years from now will be unable to observe the cosmic background radiation or any galaxy but our own. Civilizations wil evolve, invent science, use the best tools possible, and incorrectly conclude that the universe consists of one single galaxy alone in a vast sea of empty space. When we triply rewrite hard drives, we understand that information can be destroyed. Sometimes the universe does the samething. Sometimes information is irretrievably lost.