I have a question for physicists/material scientists: As we know, digital media eventually degrade until they're unreadable. Even the best won't last more than a hundred years in conventional storage conditions.
But what if we took the most inert and resilient media - say a gold plated glass-master DVD - and stored it on a satellite in a vacuum. Would this last indefinitely? After all, the temperature would be negligible, so even the most gradual of processes (such as the glass 'melting' and rolling into a ball) would take millions of years.