There’s a restless giant on the Alaskan landscape. Just where the state’s panhandle squeezes past a corner of Canada’s Yukon, at the foot of the Saint Elias Mountains, a massive glacier sprawls across a flat plain. Alternating bands of snow and rocky debris ring its miles-long edge to create the appearance of ripples on a pond frozen in time. The Malaspina Glacier, known as Sít’ Tlein in Lingít, is the largest glacier of its kind in North America, at some 1,500 square miles. The researchers studying it say size isn’t…