The massive "doomsday glacier" known for its rapid destabilization is undergoing a "vigorous ice melt" that scientists say could reshape sea level rise projections. In a new study, glaciologists from the University of California, Irvine, found that warm, high-pressure ocean water is seeping beneath West Antarctica's Thwaites Glacier, making it more vulnerable to melting than previously thought. The glacier is roughly 80 miles across, the widest on Earth. It packs so much ice that if it were to completely collapse, it could singlehandedly cause global sea levels to rise by more than two feet, according to the International Thwaites Glacier...