Earlier quoted context omitted.
I think what you consider the hardest part, putting it together so that someone who does not speak any human language today deciphers it, is actually one of the least of your problems. Unless you deliberately encrypt the information (which you wouldn’t), I have a feeling that even Wikipedia alone might be sufficient for a motivated civilization to figure it out. Linguists and archeologists in our time have to do with…
Off world would help, no atmosphere on the moon for instance makes for less deterioration, and a cave system would shield it from radiation. On earth clay tablets have done a great job : we have tablets 6000 years old, so we know that works. That’s 60% of 10k already. Titanium seems expensive and might be melted down in time of need, like bronze has been often in the past. Clay tablets survived partly because it’s a…
The ones that survived