Observing Greenland from a helicopter, the main problem is one of comprehending scale. I have thought we were skimming low over the waves of a fjord, before noticing the tiny shadow of a seabird far below and realizing what I suspected were floating shards of ice were in fact icebergs the size of office blocks.

The world's second biggest body of ice - the Greenland Ice Sheet - is cracking open quicker than scientists had previously thought. That's according to new research by a team of scientists, led by Dr Tom Chudley,