The slow-motion dance is the latest act in a decades-long journey that A23a embarked on after splitting from Antarctica in 1986. It is also staving off the iceberg’s demise.

About the size of Rhode Island, the iceberg known as A23a got stuck in an ocean vortex this summer, spinning in place for months. Now, it's free, and heading back into open Antarctic waters.

The iceberg in question is A-23A, sometimes called A23a. It is the world’s oldest and largest — about the size of Rhode Island — and weighs nearly 1 trillion tons.

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Satellite images of the A23a iceberg splitting apart near South Georgia, on May 3, 2025. NASA/Aqua. Then, in the summer of 2024, A23a became trapped in a Taylor column, a rotating current, above a ...

The world's largest iceberg, A23a, is spinning north of Antarctica and it probably will do so for a long time. The block of ice is caught in a swirling ocean current caused by an obstruction on ...

The world's largest iceberg, which has been stuck in the shallow waters off South Georgia Island for months, is losing its edge, eroded by the waves and the past austral summer, reports Europa Press.