BBC: Pine Island Glacier (PIG), the longest and fastest flowing glacier in the Antarctic, has spawned a huge iceberg.
The block measures about 720 sq km in area - roughly eight times the size of Manhattan Island in New York.
Scientists have been waiting for the PIG to calve since October 2011 when they first noticed a spectacular crack spreading across its surface.
Confirmation that the fissure had extended the full width of the glacier was obtained on Monday.
It was seen by the German TerraSAR-X...