4 ms·
Use ion beam deposition (http://en.wikipedia.org/wiki/Ion_beam_deposition http://en.wikipedia.org/wiki/Ion_beam_deposition). You can inscribe 20,000 pages on a
by GnarfGnarf 16y ago
Use ion beam deposition (http://en.wikipedia.org/wiki/Ion_beam_deposition http://en.wikipedia.org/wiki/Ion_beam_deposition). You can inscribe 20,000 pages on a 5" nickel disk. The data can be read by any civilization that can build an optical microscope. It will last for millennia.