National Geographics Polar Explorations

The Icy Heart of Polar Seas (1x5)

Air date: Mar 06, 2015

Virtually every living thing in polar waters, from single-celled phytoplankton to whales, has evolved in a world dominated by sea ice. Study how Arctic and Antarctic marine ecosystems work, and consider what happens to a sea ice-dependent marine ecosystem when the sea ice begins to disappear.