A scientist works Tuesday, May 29, 2012, in an above-ground version of a laboratory to be opened nearly 4,900 feet beneath the earth in Lead, S.D. The lab's experiments will include the world's most ... more 
A scientist works Tuesday, May 29, 2012, in an above-ground version of a laboratory to be opened nearly 4,900 feet beneath the earth in Lead, S.D. The lab's experiments will include the world's most sensitive dark-matter detector. Scientists say that the Sanford Underground Research Facility _ housed inside the now-shuttered Homestake Gold Mine _ could help scientists understand the origins of the universe. (AP Photo/Amber Hunt) less 
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Associated Press | Photo By Amber Hunt
Wed, May 30, 2012 3:08 AM EDT