The trillion-ton slab of ice — called a megaberg — could slam into South Georgia Island, making it hard for penguin parents to feed their babies and some young could even starve.

The trillion-ton slab of ice named A23a could slam into South Georgia Island and get stuck or be guided around it by currents.

Millions of seals and penguins are threatened by a very large iceberg drifting toward their remote island in the South Atlantic. The giant iceberg, named A23a, is the world's largest iceberg ever to break loose from Antarctica.