Frozen Planet

David Attenborough explores the life and work of people in the polar regions, including the residents of Norilsk in Siberia, the coldest city on Earth. He also discovers how the Danish armed forces maintain their country's claim to Greenland's natural resources by mounting a 2,000-mile dog sled patrol during the winter, and finds out how a research base at the South Pole is able to cope with being cut off from the outside world for six months at a time less