The Secret Sounds of Stressed Plants Unveiled
TL;DR
Plants make popping sounds that are undetectable to the human ear, according to a new study. The research suggests the world around us is a cacophony of plant sounds, and plants make more sounds when thirsty or under other kinds of stress. The noises come from cavitation, a process in which an air bubble in the plant's water column collapses under some kind of pressure, making a click or pop. While the plant sounds are a passive phenomenon, other organisms might be able to use the plant's audible cues for their own benefit.
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