Kronebreen Glacier, Svalbard
Kronebreen Glacier, Svalbard
Camp on the Greenland Ice Sheet
Camp on the Greenland Ice Sheet
Moulin and melt river, Greenland Ice Sheet
Moulin and melt river, Greenland Ice Sheet

A meltwater river and a moulin - a deep well into the heart of the ice sheet - in Greenland.

Melt lake, Greenland Ice Sheet
Melt lake, Greenland Ice Sheet

A blue lake formed of melt water on the surface of the Greenland Ice Sheet.

Melt pool, Greenland Ice Sheet
Melt pool, Greenland Ice Sheet

Sunset reflected in a frozen pool of melt water on the surface of the Greenland Ice Sheet.

Illulissat Icefjord, Greenland
Illulissat Icefjord, Greenland

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.

Collecting eggs, Chukotka
Collecting eggs, Chukotka

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.

Walrus hunt, Chukotka
Walrus hunt, Chukotka

Inuit hunters in Chukotka, Russia, butchering a walrus they shot at sea.

Caribou, Northwest Territories, Canada
Caribou, Northwest Territories, Canada

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.