(Continued from page 24)

other experiment meant to detect dark matter.
• Both experiments are housed nearly a mile beneath the earth in the former Homestake Gold Mine. Officials with the Sanford Underground Research Facility say that the first detector units were built through Monday when physicist Ryan Martin "attached a polished germanium-crystal detector the size of a hockey puck to a wafer-thin glass electronics board."
• The experiment will need about 70 such units to search for neutrinoless double-beta decay.
•

• PIERRE, S.D. (AP) -- Five South Dakota properties have been added to the National Register of Historic Places.
• The South Dakota State Historical Society says the five structures are at least 50 years and have historical significance.
• The five structures are made up of a home in Pierre, cabins in Deadwood and Hill City, a chapel in Rapid City and a historic district in Yankton.
• The earliest structure built of the five is the Pearson Cabin in the Deadwood vicinity, which was built in 1876.
• State historic preservation officer Jay Vogt says that when properties get listed on the National Register, it shows owners take pride in preserving culture, heritage and history.
•