Imagine audio technology in 5 billion years. Its all underground because the sun went Red Giant, expanded to two a.u. and vaporized the surface of the planet. Except wait, that didn't happen, because in only 750 million years the Andromeda Galaxy collided with the Milky Way pulling the Earth out of orbit and casting it into icy interstellar space. Where humans live underground, only to escape from freezing cold not vaporizing heat.
Predictions are hard. Especially about the future.
Predictions are hard. Especially about the future.