Nova Season 4 Episode 20 - The Green Machine

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Watch Nova season 4 episode 20 online for free at WatchSeriesLite. Botany 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. A weekly documentary series, each episode providing an in-depth look at a different subject of scientific research. Subjects examined by this show have included…

Air Date: January 11, 1978

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