iceberg

World's largest iceberg, A23a, on the move after three decades; 4,000 sq km behemoth drifting past Antarctic Peninsula

The iceberg, dubbed D28, broke away from the Amery ice shelf between September 24 and 25

Icebergs calving from Antarctica are a regular occurrence

Loss of so much ice would shrink the shelf by about 10 per cent, leaving it with the smallest area ever recorded

Surrounded by shallow water, the iceberg is estimated to be about 150 feet at its highest point

'She should have never been put to sea'

Colony of 160,000 has shriveled to just 10,000 since 2011