Frozen Planet

After non-stop summer months, the polar regions have expanded maximally, abundant food turns even the bears sociable. However the shortening of days soon starts reversing the process as frost expands the ice again. So many seasonal migrations turn too, mainly leaving for warmer regions. A stunning exception are the 'giant' emperor penguins, who arrive to mate, lay and raise their eggs in heroic defiance of the planet's harshest conditions. less

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