The idea of protecting data against catastrophic events reminds me of the KEO satellite project, which I think is not yet officially dead but has been delayed t

The idea of protecting data against catastrophic events reminds me of the KEO satellite project, which I think is not yet officially dead but has been delayed to the point that it seems doomed. But they aspired to put a lot of data in a very durable format on a satellite, to act as a kind of time capsule, intended to be recovered tens of thousands of years into the future. I think the intent was to use optical media, but made of glass. Clearly this isn't yet an example of successfully preserving data. But the mindset of setting a goal to make something readable in the very distant future seems admirable.