It’s like watching ‘Manhattan breaking apart in front of your eyes’, says one of the researchers for filmmaker James Balog. He’s describing the largest iceberg calving ever filmed, as featured in his movie, Chasing Ice. After weeks of waiting, the filmakers witnessed 7.4 cubic km of ice crashing off the Ilulissat glacier in Greenland. Chasing Ice, released in the UK on Friday, follows Balog’s mission to document Arctic ice being melted by climate change. Watch our second clip from the documentary to see the filmmakers abseil down Survey Canyon on the Greenland ice sheet to capture some startling images of meltwater rushing down a moulin