M.I.T.'s Technology Review is carrying a story on smart bandages. The bandage, applied directly to a wound, changes color when bacteria are identified, with the color indicating the type of bacteria present -- red for e coli, for example. The technology is poised to make its way to places other than triage and emergency rooms and first aid kits, though: 'The same technology could be applied to meat wrappers and other food packaging, which would show a warning color upon detection of food-borne bacteria. Such sensors could also be affixed to drinking glasses that would check for water purity or indications of biowarfare. Bandages aren't just for skinned knees anymore.'