Life on Earth

Season 1 Episode 9

Chapter 9: Eggs, Pouches, and Placentas

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Aired Unknown Mar 13, 1979 on BBC Two
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Chapter 9: Eggs, Pouches, and Placentas
AIRED:
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 colonisation of Australia.moreless
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