How Did Canaries Help Coal Miners?
There was a time when coal miners wouldn’t set foot in a coal mine without a canary present. Canaries protected them from a danger that lurks in the mines—carbon...
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What Is a Gordian Knot?
What Is a Gordian Knot? “Cutting the Gordian Knot” is an expression describing the solution of a problem by quick, decisive action. It is often used as a metaphor for...
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