For Erin Woodward, a Black Hills native, a college internship at SURF opened her eyes to the deep roots of the Homestake Gold Mine, the very site the laboratory now calls home.

LEAD - The pumps that keep the deepest levels of the Home-stake gold ... in the mine - that's my hope, that it doesn't occur. On the other hand, if it does occur, I still believe that Homestake ...

Today, the former Homestake Gold Mine, a 300-mile (480-kilometer) tunnel system carved inside the mountains, houses the Sanford Underground Research Facility, where scientists study particle ...