Overview
Frogs, snakes and turtles play vital roles as janitors and regulators of the environment.
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15 - 1And God Created Great Whales October 09, 1974 -
15 - 2Children's Hospital October 23, 1974
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15 - 3The Heimaey Eruption: Iceland 1973 October 30, 1974
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15 - 4Traveller From An Antique Land November 06, 1974
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15 - 5Mind And Hand November 20, 1974
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15 - 6Frogs, Snakes and Turtles December 04, 1974
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15 - 7Discovery on Charlton Island December 11, 1974
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15 - 8The First Inch December 18, 1974