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Cell phones let you chat with friends, send emails and even guide you to the nearest pizza joint. But now these toys are acquiring more serious roles: They're turning into personal and environmental sensors useful for health and science.
Cell Phones Allow Everyone to Be a Scientist - Yahoo! News (http://news.yahoo.com/s/livescience/20090605/sc_livescience/cellphonesalloweveryonetobeascientist - broken link)