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

Roughly 3,500 square kilometres (1,550 square miles) across, the world's biggest and oldest iceberg, known as A23a, calved from the Antarctic shelf in 1986. It remained stuck for over 30 years ...

The huge iceberg A23a measures almost 1,500 square miles, roughly twice the size of Greater London, and is as tall as the Shard in London. Dr Andrew Meijers, physical oceanographer at British ...