Impressive technical achievements and an urgent appeal to reverse global
warming distinguish this nature film from other documentaries that
anthropomorphize cuddly baby animals. Husband-and-wife filmmakers Adam
Ravetch and Sarah Robertson spent fifteen years trekking across melting ice
floes and shooting underwater in glacial temperatures to get close to polar
bears and walrus herds as they struggled in a shrinking environment.
Watching these endangered species evolve new approaches to hunting and
shelter is fascinating, but the movie is seriously marred by a cloying
screenplay and such kid-pleasing touches as shots of walruses belching and
farting. Queen Latifah narrates.