NOVASezóna 5 Přidat obrázekČíslo epizody2The Green MachineOverviewBotany is a neglected science and plants are all around us, but unfamiliar. NOVA examines our state of knowledge of how plants work: growth hormones, responses to light and shade, photosynthesis, root mechanisms and twining responses.Air dateJanuary 11, 1978Runtime (min)60