Scientists have apparently discovered that special proteins from a marsh reliant organism, once modified for longevity, could allow for Dvd sized disks to hold nearly 50TB of data.
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Unlike traditional optical or magnetic solutions, the disc developed by Professor V Renugopalakrishnan and his colleagues is coated with thousands of light-activated proteins called bacteriorhodopsin which are found in the membrane of a particular salt marsh microbe -- and which temporarily convert to a series of intermediate molecules when exposed to sunlight.
That property allows the proteins to act as individual bits in a binary system, but since they have a tendency to return to their grounded state after mere hours or days, Renugopalakrishnan and his team modified the requisite microbes' DNA to produce proteins capable of maintaining that intermediary state for several years. Unfortunately we won't see this technology come to market anytime soon, and even when it does, 50TB capacities will still be a ways off
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