Sled dogs wading through standing water on the sea ice during an expedition in Northwestern Greenland, in this June 13th photograph taken by Steffen Olsen of the Centre for Ocean and Ice at the Danish Meteoroligical Institute. Photograph: Steffen Olsen/AFP/Getty Images

Rapidly melting sea ice in Greenland has presented an unusual hazard for research teams retrieving their oceanographic moorings and weather station eq(...)