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Updated: May 27, 2025
But we must not forget that popular demand for this convenient form of power arose only about 100 years ago, mainly for illumination. Recent experiments in superconductivity, using ceramic instead metal conductors have given us an exciting glimpse into what might be achieved for improving efficiency in the distribution of electric power.
In current Earth science tin and mercury and a few alloys could be made into superconductors by being cooled below 18° Kelvin, or four hundred odd degrees Fahrenheit below zero. Above that temperature, superconductivity did not exist. But the children's wire was a superconductor at room temperature. A thread the size of a cobweb could carry all the current turned out by Niagara without heating up.
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