Sea levels could rise twice as fast as previously predicted
Limited understanding of past ground shifts adds uncertainty to projected increase by 2100
![Thwaites Glacier in West Antarctica](https://i0.wp.com/www.sciencenews.org/wp-content/uploads/2016/04/040416_ts-Arctic-melting_free.jpg?fit=840%2C460&ssl=1)
ON THE RISE The collapse of keystone glaciers in West Antarctica, such as Thwaites Glacier, could raise sea levels faster and sooner than thought.
NASA/Wikimedia Commons