Article Photos: Dark matter detector nearing activation in SD mine 2/3

  In this Oct. 16, 2012 photo provided by Sanford Lab University of California, Davis, physicist Jeremy Mock inspects the Large Underground Xenon experiment detector, cylinder at center, that has now been lowered into its 70,000-gallon home in a water tank a mile beneath the earth’s surface in 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)