Scientists using ice-breaking ships and underwater robots have found the Thwaites Glacier in Antarctica is melting at an accelerating rate and could be on an irreversible path to collapse, spelling catastrophe for global sea level rise.Since 2018, a team of scientists forming the International Thwaites Glacier Collaboration, has been studying Thwaites — often dubbed the “Doomsday Glacier” — up close to better understand how and when it might collapse.Their findings, set out across a collection of studies, provide the clearest picture yet of this complex, ever-changing glacier. The outlook is “grim,” the scientists said in a report published Thursday, revealing the key conclusions of their six years of research.They found rapid ice loss is set to speed up this century. Thwaites’ retreat has accelerated considerably over the past 30 years, said Rob Larter, a marine geophysicist at the British Antarctic Survey and part of the ITGC team. “Our findings indicate it is set to retreat further and faster,” he said.The scientists project Thwaites and the Antarctic Ice Sheet could collapse within 200 years, which would have devastating consequences.Thwaites holds enough water to increase sea levels by more than 2 feet. But because it also acts like a cork, holding back the vast Antarctic ice sheet, its collapse could ultimately lead to around 10 feet of sea level rise, devastating coastal communities from Miami and London to Bangladesh and the Pacific Islands.Photograph of the high cliffs of Thwaites Glacier taken from the British Antarctic Survey Twin Ott …