https://www.scientificamerican.com/article/maps-that-peer-below-antarctic-ice-show-precarious-position-of-key-glacier/

One of Antarctica’s most vulnerable glaciers may be in more precarious shape than scientists thought. If the enormous Thwaites Glacier loses enough ice, its retreat could become “unstoppable.”

That’s according to a detailed new map of the world’s largest ice sheet, published yesterday in Nature Geoscience. Known as “BedMachine Antarctica,” the project presents a comprehensive layout of the landscape underneath the ice—all the bumps, ridges and chasms in the bedrock that form the Antarctic continent and holds its glaciers in place.