Physicists may see data as soon as late summer from the prototype for a $278 million science experiment in northern Minnesota that is being designed to find clues to some fundamental mysteries of the universe, including dark matter. But it could take years before the nation's largest "neutrino" detector answers the profound questions that matter to scientists. Construction is underway now on a 220-ton detector that is the "integration prototype" for a much larger 14,000-ton detector. Both are part of NOvA, a cooperative project of the Department of Energy's Fermi National Accelerator Laboratory near Chicago and the University of Minnesota's school of physics and astronomy. The project may ultimately aid understanding of matter and dark matter, how the universe formed and evolved, and current astrophysical events. Read more