The eastern ice shelf of the Thwaites Glacier is supported at its northern end by a ridge of the ocean floor. A new study by the International Thwaites Glacier Collaboration (ITGC) presents a detailed record of this gradual collapse process. A fast-motion video of Thwaites Glacier in Antarctica over a period of about 10 years. Video: University of ManitobaThe Crack in the Ice Shelf Widens in Two StagesThe study reveals that the weakening of the ice shelf occurred in four distinct phases, with crack growth occurring in two stages. This process was clearly recorded by the GPS devices that the team deployed on the ice shelf between 2020 and 2022.