Overview
Horizon makes an investigation into plant biology.
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14 - 1A Smile for a Crocodile January 07, 1977 -
14 - 2The Pill for the People January 14, 1977
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14 - 3The Ape That Stood Up January 21, 1977
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14 - 4The Human Animal February 04, 1977
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14 - 5The Guinea Pig and the Law February 18, 1977
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14 - 6Hunters of the Seal February 25, 1977
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14 - 7The Red Planet March 04, 1977
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14 - 8One of Nature's Hotels March 11, 1977
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14 - 9Dawn of the Solar Age March 18, 1977
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14 - 10Genetic Roulette April 01, 1977
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14 - 11The Amazing Doctor Newton July 15, 1977
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14 - 12The Trouble with Medicine July 22, 1977
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14 - 13Silent Speech July 29, 1977
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14 - 14The Green Machine August 05, 1977
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14 - 15The River That Came Clean September 02, 1977
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14 - 16Blueprints in the Bloodstream September 09, 1977
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14 - 1740 Years of Murder September 16, 1977
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14 - 18The Cry for Help September 30, 1977
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14 - 19The Sunspot Mystery October 07, 1977
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14 - 20The Rhine's Revenge October 21, 1977
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14 - 21Icarus' Children December 02, 1977
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14 - 22The Healing Nightmare December 09, 1977
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14 - 23The Great Wine Revolution December 23, 1977
