Archival memory

Not satisfied with archival media that will only go 100 - 200 years?

How about 1 billion years. That enough?
http://www.physorg.com/news163328683.html

The storage density is 1 Tbit/in^2.

Here are another two with a mere 1M year duration. (No statement of
density however).

http://www.ecn.purdue.edu/WBG/Device...ory/Index.html

http://www.sciencedirect.com/science...a4332c35f7bfd9

I would bet one of the three (or other technologies) becomes
commercially available within 10 years. (A CNET article cites 2 years
for the nanotube based memory, but I'd bet that's optimistic)

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