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".....When it comes to data storage, density and durability have always moved in opposite directions -- the greater the density the shorter the durability. For example, information carved in stone is not dense but can last thousands of years, whereas today’s silicon memory chips can hold their information for only a few decades. ....“We’ve developed a new mechanism for digital memory storage that consists of a crystalline iron nanoparticle shuttle enclosed within the hollow of a multiwalled carbon nanotube,” said physicist Alex Zettl who led this research......"from:DOE/Lawrence Berkeley National Laboratory (2009, May 26). New Memory Material May Hold Data For One Billion Years. ScienceDaily. Retrieved June 5, 2009, from http://www.sciencedaily.com­ /releases/2009/05/090525105418.htm