In the north, the focus shifts to the Arctic Ocean, where sea ice is a critical hunting platform for polar bears . It also features narwhals navigating seasonal ice cracks to reach their feeding grounds. Key Highlights
The episode details how life flourishes around the Antarctic Peninsula. It follows Gentoo penguins navigating sea ice and explains the vital role of krill , which feed on algae beneath the ice and support the entire southern food web.
The episode captures the massive Store Glacier in Greenland calving, sending colossal icebergs into the sea.
One of the most famous and harrowing scenes shows thousands of walruses forced onto a small, rocky beach in Russia due to lack of sea ice. Desperate for space, some climb high cliffs and, unable to navigate back down safely, fall to their deaths.