Sir David Attenborough's extensive series spans the globe in its effort to examine the mating, social and food gathering rituals of 4,000 species of mammals. The most diverse creatures on Earth, mammals inhabit every imaginable climate and environment. All 10 episodes─including "A Winning Design," "Plant Predators," "Meat Eaters," "Return to the Water" and "Social Climbers"─are available in this comprehensive four-volume set. 8 1/2 hrs. total. Widescreen (Enhanced); Soundtrack: English Dolby Digital stereo; Subtitles: English; photo gallery; featurettes; music video; behind-the-scenes footage; more.