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

T​he largest iceberg in the world is headed toward an island with a massive population of penguins and seals, according to satellite tracking from NOAA. T​he trillion-ton slab of ice that scientists call a "megaberg" broke off from the Antarctic’s Filchner Ice Shelf in 1986.