The iceberg, known as B-22A, is around 1,158 square miles in area—around 4 times the size of New York City. The piece floating off into the ocean is the largest remaining chunk of a larger, 1,500 square mile iceberg that sheared off from the Thwaites Glacier in 2002, which was around the size of Rhode Island. Do you have a tip on a science story that Newsweek should be covering? Do you have a question about icebergs? Let us know via science@newsweek