Author: Miss Cellania / Source: Neatorama
The phrase “a canary in a coal mine” refers to the demise of the weakest member as a warning of danger to the rest of the group. The phrase comes from the use of real canaries as carbon monoxide detectors.
Canaries were used in mines from the late 1800s to detect gases, such as carbon monoxide.
The gas is deadly to humans – and canaries alike – in large quantities, but canaries are much more sensitive to small amounts of the gas, and…
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