Brings up an interesting topic: if I wanted to preserve a movie for 100,000 or even 1,000,000 years, how would I do it? What physical media would last that long, and could actually be played back correctly and accurately by some archaeologist in the year 1,002,025?
Plated of quartz, etched internally via focused femtosecond pulsed-laser to create tiny voids or just changes in crystal lattice that encode bits as changes in the polarization of light passing back through the glass.
It's been studied in various ways for a while now.
