(CNN) — Plants make popping sounds that are undetectable to the human ear, according to recordings made in a new study — and they make more sounds when thirsty or under other kinds of stress. She said ...
2. The Secret of the Popping Sound We’ve all done it, sitting idle, stressed, or just bored, we twist our fingers till they pop! Some find it relaxing, others find it annoying. But have you ever ...
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