Measuring roughly 1,350 square miles (3,500 square kilometers) across, A23a is the world's largest and oldest iceberg ...
As of Jan. 16, the megaberg, known as A23a, is roughly 180 miles (290 kilometers) away from South Georgia and the South ...
Environmentalists fear for the island's rare king penguins and millions of elephant and fur seals if iceberg collides.