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Researchers are listening to earthworms to monitor soil health, in what could be a major innovation for maintaining soil health. In the first study of its kind, scientists are using a technique called ecoacoustics to listen to the activity of earthworms and other invertebrates in the soil. The theory is that a noisy soil is a healthy soil – and that the sounds generated in soil can be recorded, measured and used to evaluate soil condition. Press release (14 July 2023)