Cold Regions Research and Engineering Laboratory (CRREL) scientist Hannah Wittmann (right) peers into a crevasse along the roughly 1,000-mile long South Pole Traverse (SPoT) route. Wittmann and fellow scientist Dr. Zoe Courville recently returned from Antarctica, where they performed critical crevasse detection and mitigation on the most problematic portion of the flagged trail, a three-mile wide shear zone where the McMurdo and Ross ice shelves meet.