Roughly 1,550 square miles across, the world's biggest and oldest iceberg, known as A23a, calved from the Antarctic shelf in 1986. Before its calving in 1986, the colossal iceberg hosted a Soviet ...

The world's biggest iceberg, with a Game of Thrones style ice wall, is closing in on South Georgia Island off Antarctica. If the iceberg, known as A23a, becomes hung up in the waters around the ...

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 ...