April 11, 2007—Hundreds of miles above the Arctic Circle, filmmakers struggle against a brutal and unpredictable climate to capture walruses, beluga whales, seabirds, and other animals that stream into feeding grounds each summer.

Watch as shattering sea ice nearly strands the crew, ghostly white whales glide through a "peaceful, weightless world," and ultralight planes soar over vertigo-inducing icebergs.