These images from the Smithsonian Magazine Photo Contest show just why penguins have waddled into our hearts ...

Measuring roughly 1,350 square miles (3,500 square kilometers) across, A23a is the world's largest and oldest iceberg ...

The 'world's biggest iceberg', "A23a iceberg", which is more than twice the size of London, is drifting toward South Georgia ...

The biggest iceberg on Earth is heading toward a remote island, creating a potential threat to penguins and seals inhabiting ...

The world's biggest iceberg is drifting toward a tiny south Atlantic island, potentially affecting the wildlife there, ...

The world’s largest iceberg is still on the move and there are fears that it could be headed north from Antarctica towards the island of South Georgia.

The world's biggest iceberg -- more than twice the size of London -- could drift towards a remote island where a scientist ...