@inthehands
That's totally true. I watched a French documentary on long term nuclear waste storage sites which have to keep them for many centuries (millenia even!) and they were researching solutions to keep instructions on how to (not) handle and keep away from the site for future generations (civilisations even) who won't even speak speak the same language. They chose acid free paper in climate controlled rooms for the first decades and century. They were also speaking about genetically engineering a new bread of cats to glow near nuclear material and had some idea on songs about being fearful of glowing cats because it meant danger. They say that's how stories travel through millenias and that could help future people to not access the dangerous zones of the site, even after a civilisation collapse. Far fetched but interesting.