The problem I have with most of this deep storage tech, is the logarithmic leaps in both duration and density offered, but without clear explanation of how it is both down in the single-digit atom/molecule scale write event, requires low enough energy to change state immutably (?) that it's achievable, yet can resist thermal and other energy (particles? cosmic rays?) to remain un-flipped for centuries or longer.<p><a href="https://en.wikipedia.org/wiki/Luminescence_dating" rel="nofollow noreferrer">https://en.wikipedia.org/wiki/Luminescence_dating</a> is a thing. So.. isn't this functionally changing the material in "reading" its imputed age? It doesn't take a citys worth of electricity to do this. Admittedly, the "data" has persisted for thousands of years, but its a statistical average over a sample not bit-accurate.<p>Presumably there's error correcting codes, sequences, a gross signal timebase or positional "record" marker, all those things which have to sit around the tiny grain of sand with the entire bible in it, probably make it a bit "bigger" in all senses.