HowStuffWorks via myPod

British miners are ordered to replace canaries with electronic carbon monoxide sensors - December 30th, 1986

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On this day in 1986, a British mining tradition came to an end when legislation officially ordered that all live canaries be released from the nation’s coal mines. Learn more about your ad-choices at https://www.iheartpodcastnetwork.com


https://www.listennotes.com/e/b28d020b2fba46948bc6a8f7bedd3910/
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HowStuffWorks via myPodBy Joshua Hoover
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