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Aeon ·Future-gazing

Worm Munch Matters

by Ella Browning

Published 2026-08-17 10:00:00+00:00

If you bury a microphone in the ground, what does healthy soil sound like?

0:00 / 21:10 · Narrator Sulafat

Context

Biologists have long dropped microphones into ocean trenches to track whales, or pointed them at the dark sky to map the flight of bats. In this essay published on 17 August 2026, the microphone gets buried in the dirt. The piece asks a strange and surprisingly practical question: what does a healthy ecosystem actually sound like underground? By treating soil as a noisy, living habitat rather than a silent foundation, it offers a completely different way to measure the recovery of the natural world.

Show notes

An introduction to soil ecoacoustics, a method that uses buried microphones to record the movements of earthworms and other underground animals. Building on the history of acoustic monitoring used to track whales and bats, researchers are testing whether these audio recordings can serve as a reliable metric for soil health. The work requires isolating faint biological noises from human interference and creating a new reference library of soil sounds.

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