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 of ice — called a megaberg — could slam into South Georgia Island and get stuck or be guided around it by currents.

An iceberg about 1,500 square miles in size is on a collision course with a remote island in the South Atlantic. The world's largest iceberg, known as A23a, broke loose from Antarctica's Filcher Ice Shelf in 1986,

A trillion-tonne iceberg 33 times the size of Paris is making its relentless way towards the remote overseas British territory of South Georgia. The world's largest iceberg, which split off from an Antarctic ice shelf 38 years ago before becoming stuck in an oceanic vortex,