Best Long Term Info Storage Technology

I think you’d be lucky if the length of the reference was any shorter than the length of the text. If your reference degraded you might find it pointing to a Danielle Steele novel.

Yes. Put the A-bomb in the text requiring scanning tunneling microscopes.

I think it was: “Be excellent to each other.” Or was that Bill and Ted?

That’s the beauty of it.

Stranger

What if they use Base Four?

Another advantage of putting it on the Moon is that you can make it easy to find. Dig a huge bullseye into the surface and it’ll remain visible for a very long time, and I expect that any human culture even one that has lost all knowledge of our conventions would look at the center of a bunch of concentric circles.

Yes, but the idea is older than that. For example, I recall a novel called Neverness where there was a message hidden in the “junk” DNA, engineered into it by a superior being. The message as it turned out was important information on how to go about becoming a superior being.

The D.O.E. needs long-lived messages that don’t rely on English. (Perhaps someone has a better cite for info on that project.)