A Sensor Descends Down a Hole in the Ice (IMAGE) U.S. National Science Foundation Caption A sensor descends down a hole in the ice as part of the final season of IceCube. Icecube is among the most ambitious scientific construction projects ever attempted. Credit NSF/B. Gudbjartsson Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.