The LUX Dark Matter Detector is installed in the Davis Cavern of the Sanford Lab in South Dakota in March. The water tank measures 24 feet in diameter, is two stories high and will hold 71,600 gallons.
Credit Steve McEnroe / AP
Businessman and philanthropist T. Denny Sanford has pledged $70 million to the Sanford Underground Science and Engineering Laboratory. He stands next to a plaque dedicating the 4,850 foot level, where several experiments will be set up, in 2009.
Credit Dirk Lammers / AP
The entrance to the Sanford lab is through the Ross Shaft building of the old Homestake Mine in Lead, S.D.
In Lead, S.D., a steel cage drops almost a mile below ground into the Sanford Underground Laboratory. It's formerly the deepest underground gold mine in North America, and when it closed a decade ago, state officials hoped that an underground science laboratory along with on-site university classes could spur economic development.
Scientists reported new evidence Wednesday that supports a provocative theory about cancer.
Three separate teams of scientists said they had, for the first time, shown that so-called cancer stem cells can be found naturally in brain tumors and early forms of skin and colon cancer.
Evidence has been mounting in recent years for the existence of these cells, which would be especially insidious. They are believed to resist standard chemotherapy and radiation and fuel the growth of tumors and relapses.