---
title: "When the Canaries Stopped Singing, the Mines Got Quieter Than Anyone Expected"
canonical: "https://anchor.is/docket/issue/28/archive/article/13094/when-the-canaries-stopped-singing-the-mines-got"
publication: "The Docket"
publisher: "The Docket"
language: "en-US"
guide: "https://anchor.is/docket/llms.txt"
issue: 28
section: "archive"
section_name: "Climate Past"
published: 2026-04-15
word_count: 129
source_links: 0
---

# When the Canaries Stopped Singing, the Mines Got Quieter Than Anyone Expected

*April 15, 2026*

[Read on the website](<https://anchor.is/docket/issue/28/archive/article/13094/when-the-canaries-stopped-singing-the-mines-got>)

In 1896, John Scott Haldane descended into the Tylorstown Colliery in South Wales and found four dead miners beside a lit oil lamp. Plenty of oxygen. Their blood was cherry red. Carbon monoxide.

His solution was a canary. Its respiratory system, a unidirectional loop of air sacs, absorbed poison roughly twenty minutes before a human body registered anything. And the warning was graded: agitation, then quiet, then stillness. Silence itself was the alarm.

On December 30, 1986, Britain retired the last colliery canaries for electronic catalytic sensors. Cheaper, multi-gas capable, humane. Miners objected anyway. A catalytic sensor can be silently poisoned by compounds common underground, and a poisoned sensor looks exactly like a functioning one. A dying canary, at least, had the decency to show you it was dying.

## More

- [Climate Past — Issue 28](<https://anchor.is/docket/issue/28/archive/markdown>)
- [Issue 28](<https://anchor.is/docket/issue/28/markdown>)
- [Publication guide](<https://anchor.is/docket/llms.txt>)