Once King Of The Seas, A Giant Iceberg Is Finally Breaking Up

Infographic with map showing the trajectory of iceberg A23a, the largest iceberg in world, from 1986 to its breaking up at the end of August 2025 north of South Georgia island (Credit: AFP)

Nearly 40 years after breaking off Antarctica, a colossal iceberg ranked among the oldest and largest ever recorded is finally crumbling apart in warmer waters, and could disappear within weeks.

Earlier this year, the "megaberg" known as A23a weighed a little under a trillion tonnes and was more than twice the size of Greater London, a behemoth unrivalled at the time.