Enlarge ImageNever forget. Microscopic iron crystals moving within carbon nanotubes could hold computer data permanently. Credit: Zettl Research Group/LBNL/UC Berkeley That embarrassing home movie of you naked in the tub could still be around millions of years from now, along with your less-than-eloquent posts on Facebook and Twitter. Researchers have developed a new technology based on carbon nanotubes that promises to permanently preserve individual bits of data, such as those found on computer hard drives and DVDs. If so, the technology could lead to data archives holding the entirety of human thought and communications potentially forever. As our technological...