Return To The Sea: The Life And Evolutionary Times Of Marine Mammals,New Christopher G.L. Shirley Brice Heaths Landmark Study

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Return To The Sea: The Life And Evolutionary Times Of Marine Mammals,New Christopher G.L. Shirley Brice Heaths Landmark StudyReturn To The Sea Portrays The Life And Evolutionary Times Of Marine Mammalsfrom Giant Whales And Sea Cows That Originated 55 Million Years Ago To The Deepdiving Elephant Seals And Clameating Walruses Of Modern Times. This Fascinating Account Of The Origin Of Various Marinemammal Lineagessome Extinct, Others Extant But Threatenedis For The Nonspecialist. Against A Backdrop Of Geologic Time And Changing Climates And Geography, This Volume Takes