Plants Talk — We Just Cannot Hear Them

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The scientists used tomato plants for the research (Credit: Rob Bertholf /CC-BY-SA-2.0/ Wikipedia.org)

Plants undergoing stress, such as drought or insect damage, use various tactics to defend themselves and warn others of danger. Some release strong scents, while others change color and shape. A recent study found that stressed plants even produce popping or clicking sounds. However, humans cannot hear them because they are at frequencies beyond our hearing range.

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