A, the world’s oldest and largest (about the size of Rhode Island), may hit South Georgia Island, home to vulnerable penguins and seabirds.

Measuring roughly 1,350 square miles (3,500 square kilometers) across, A23a is the world's largest and oldest iceberg ...

Known as A23a, the 1,400-square-mile iceberg had been stuck on the ocean floor near Antarctica for 37 years, after splitting in 1986 from the Antarctic’s Filchner Ice Shelf. But it began to move again ...

The world's biggest iceberg — a wall of ice the size of Rhode Island — is lumbering toward a remote island off Antarctica that's home to millions of penguins and seals. The trillion-ton slab ...