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Download HD Season 1 Episode
- Season 1 The Infinite Variety
- Season 1 Building Bodies
- Season 1 The First Forests
- Season 1 The Swarming Hordes
- Season 1 Conquest of the Waters
- Season 1 Invasion of the Land
- Season 1 Victors of the Dry Land
- Season 1 Lords of the Air
- Season 1 The Rise of the Mammals
- Season 1 Theme and Variations
- Season 1 The Hunters and Hunted
- Season 1 Life in the Trees
- Season 1 The Compulsive Communicators
Life on Earth - Season 1 Episode 9 The Rise of the Mammals
9.10 55 minutes A look at the evolution of mammals from reptiles 200 million years ago. This remarkable transition involved the development of mechanisms for regulating body temperature, for allowing the young to develop in the womb and for suckling newborns. Attenborough also explores the South American origins of marsupials and their colonization of Australia
