Despite many years of research, we still do not know exactly how fast the Greenland ice sheet is melting. This is the question director Lars Henrik Ostenfeld hopes to answer when he set outs on an expedition with three of the world’s leading glaciologists. The journey will take them 180 metres into one of the major “Moulin” holes in the ice sheet — further than any human has ever gone before. Which secret harbors the ice?
