Excavating for Science in Former Gold Mine

For well over 100 years, the Homestake mine in South Dakota was the largest and deepest gold mine in North America, producing almost 50 million oz. of the precious metal until its closure in 2002. Now, the extensive maze of caverns at the site, in the state's beautiful Black Hills, is being transformed into a laboratory designed to unlock the mysteries of some of the smallest particles in the universe....

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