The Large Hadron Collider , which so captured the world's attention last month , may yield secrets of the physical universe. It could also produce a bunch of practical spin-offs . When fully operational next year, it will certainly spin off a lot of data -- enough to fill six CDs a second. To capture and sift all that information will be the combined crunching power of more than 140 computer centers from 33 countries. Fifteen U.S. universities and three U.S. Department of Energy (DOE) national laboratories are part of the effort. It is the world's largest computing grid, say researchers who helped put it together. Illustration above of simulation of LHC experiment courtesy CERN ...