S1, E5: Sir David Attenborough continues his natural history of Earth's most unforgiving continent - Antarctica. During the winter, conditions are so extreme that most animal life deserts the region. The few exceptions include emperor penguins which huddle together as storms rage and Weddell seals, which maintain holes in the ice for access to an underwater world where fish survive by having natural antifreeze in their blood.
Documentary · 16 Dec 1993 · 29 min