Two views of hot water drilling: A hole drilled for the AMANDA neutrino detector (top) and a water-filled hole photographed at a depth of approximately 2000 meters (bottom). It takes almost 40 hours of nonstop precision drilling to create a hole for IceCube -- 60 centimeters in diameter and 2.5 kilometers deep. "Ideally, you'd like a marble to drop down the center of the hole without ever touching the sides," says Bruce Koci, UW's lead drill engineer.
Credit: Top photo, Robert Morse/University of Wisconsin-Madison; bottom photo, Bruce Koci/University of Wisconsin-Madison Ice Core Drilling Services. Images used by permission.