The pack ice is returning and the arctic whales mustn't linger.Bowheads, belugas and narwhals head for open water on the southern edge of the Arctic Ocean.A thirty thousand square kilometers of ocean turns to ice everyday.As the days grow colder, millions of seabirds flee the coming darkness of the polar winter.In Hudson bay, the polar bears are still waiting for the pack ice to spread south.As November approaches, the usually solitary males not only tolerate each other's presence, they even begin to socialize.
