How about 2,000 ~ 10,000 years? http://blog.longnow.org/02008/08/20/very-long-te...

		ynniv on Sept 20, 2015 \| parent \| context \| favorite \| on: PaperBack – How to store data on a single A4/Lette... How about 2,000 ~ 10,000 years? http://blog.longnow.org/02008/08/20/very-long-term-backup/