In the frozen wilderness of Antarctica, where seas ice over and just staying alive is an achievement, one creature has perfected the art of survival -- the emperor penguin. Emperor penguins are sublimely built to conquer the cold -- but in a world threatened by climate change, can they take the heat? Parts of Antarctica are warming, giving birth to huge icebergs, and the consequences could be catastrophic in a place where all life is touched by the ice. Using Crittercam, scientists hitch a virtual ride under the ice with the emperor penguin to study the impact of climate change on the penguin's world. In a land where temperatures dip to 100 degrees below zero, and winds reach 200 mph, and in winter, the sun drops below the horizon for a month, the emperor penguins huddle together to keep warm. They either walk upright or scoot along on their bellies, swim under the ice to search for fish, and they distinguish their mates and young by voice recognition. This documentary does not spare the harsh realities of nature, on eggs and young penguins as well as adults, so it might not be suitable for young children.