According to the U.S. National Ice Center, the world's largest iceberg, named A23a, has broken up. As of August 2025, iceberg A23f, a newly named iceberg, calved from A23a in the northern Weddell Sea.

The world’s largest iceberg is “rapidly breaking up” into several large “very large chunks,” scientists from the British Antarctic Survey (BAS) have said. Previously weighing nearly a trillion metric ...