In this July 31, 2012 photo provided by Sanford Lab researchers work on the top floor of the Large Underground Xenon experiment at a shuttered gold mine in Lead, S.D. The experiment, known as LUX, could begin collecting data on dark matter as early as February _ and, if all goes as planned, that data could answer age-old questions about the universe and its origins, scientists said Monday, Nov. 19, 2012. (AP Photo/Courtesy Sanford Lab, Matt Kapust)