Guardian: An iceberg half the size of Greater London has calved off Pine Island glacier in the Antarctic.
This week a radar instrument on the German satellite TerraSAR-X captured an image of a crack having grown to extend across the entire ice shelf at the front of the glacier since 2011. Scientists say that the 720-sqkm iceberg calved off in a natural event unrelated to the effects of global warming.
Andy Smith of the British Antarctic Survey said: "Although there's nothing to suggest this event is...