An exquisitely filmed look at emperor, king, chinstrap and adélie penguins and the harsh world they inhabit in the Antarctic. Included: the emperors' breeding methods, whereby males incubate the eggs during the subzero winters, while the females gather food for the spring; and leopard seals, which can eat six penguins an hour. Also: how climate change is affecting the region.
The other side of the story of the Titanic is told by examining the history of the iceberg that sank the famous ocean liner, going back 15,000 years to its formation as part of an Arctic glacier and following the route it traveled to the North Atlantic. Included: scientists in Greenland and Newfoundland are followed as they research events.