Commentator David Shenk says a major study released today from the University of California in Berkeley aims for the impossible: to quantify how much information the world produces each year. That includes everything in a year's worth of e-mails, phone calls, radio and television broadcasts, Websites, office documents, newspapers, memos, etc. The number is so big that U.C. is coming close to the extreme end of terms that have been invented to measure such volume. (3:00)

See the study at

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