PhysOrg Posted November 8, 2019 Share Posted November 8, 2019 The concept of a canary in a coal mine – a sensitive species that provides an alert to danger—originated with British miners, who carried actual canaries underground through the mid-1980s to detect the presence of deadly carbon monoxide gas. Today another bird, the emperor penguin, is providing a similar warning about the planetary effects of burning fossil fuels. View the full article Quote Link to comment Share on other sites More sharing options...
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