A meltwater river and a moulin - a deep well into the heart of the ice sheet - in Greenland.
A blue lake formed of melt water on the surface of the Greenland Ice Sheet.
Sunset reflected in a frozen pool of melt water on the surface of the Greenland Ice Sheet.
Icebergs at the mouth of the Ilulissat Icefjord, West Greenland. The ice originated in the Jacobshavn glacier: one of the biggest, fastest moving and most iceberg-producing glaciers in the world.
Kolya, an Inuit hunter in Chukotka, Russia, descends a sea cliff on a thin rope to collect seabird eggs. The eggs will be eaten. The egg gathering is timed so that the birds can lay another egg before the end of summer.
Inuit hunters in Chukotka, Russia, butchering a walrus they shot at sea.
A wild caribou (Rangifer tarandus) of the Bathurst herd in northern Canada. During the autumn rut in October, the herd is migrating up to 500 miles south from its summer calving grounds to spend the winter in the shelter of the forest.