“Polar Explorations” S:1 E:5 The Icy Heart of Polar Seas

S:1 E:5 The Icy Heart of Polar Seas 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.