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Journal doom's Journal: mp3s encoded as DNA 1

John Timmer writes about an interesting stunt: MP3 files written as DNA with storage density of 2.2 petabytes per gram, "In general, though, the DNA was very robust. The authors simply dried it out before shipping it to a lab in Germany (with a layover in the UK), where it was decoded. Careful storage in a cold, dry location could keep it viable for much, much longer. The authors estimate their storage density was about 2.2 Petabytes per gram, and that it included enough DNA to recover the data about ten additional times."
This was pulled off by researchers affiliated with the "European Bioinformatics Group" (UK) and Agilient (Santa Clara, CA). Has anyone ever tried listening to "junk DNA"?

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mp3s encoded as DNA

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I have a theory that it's impossible to prove anything, but I can't prove it.