World’s Biggest, Oldest Iceberg Breaks Apart - Videos from The Weather Channel

World’s Biggest, Oldest Iceberg Breaks Apart

September 26, 2025

A23A, the world’s largest and oldest iceberg first broke away from an Antarctic ice shelf nearly 40 years ago, by the end of 2025 it could be no more. It’s now splintered so much it no longer holds the title of “world’s largest.” Watch this video to learn just how small it is now and what could happen next.