Just spreading a message for 10,000 years is hard enough, but you also need people to genuinely believe it for that long. Leaving some of the material above ground seems like the only way to give people a meaningful and believeable message, even if there are other ways to technically convey the same concept.
Just spreading a message for 10,000 years is hard enough, but you also need people to genuinely believe it for that long. Leaving some of the material above ground seems like the only way to give people a meaningful and believeable message, even if there are other ways to technically convey the same concept.