Plants are often seen as passive organisms, rooted in one place and largely unable to react to the world around them. But a ...

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In the 1960s and '70s, a series of questionable experiments claimed to prove that plants could behave like humans, that they had feelings, responded to music and could even take a polygraph test.

Plants appear simple on the surface. They sit quietly in soil, growing slowly while responding to light and water. Yet, there lies a complex biological system that has evolved for millions of years.