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

The world's largest iceberg -- a behemoth more than twice the size of London -- is drifting toward a remote island where scientists say it could run aground and threaten penguins and seals. The iceberg could follow that current out to sea or run aground the shelf,