Scientists have re-defined the kilogram | Learn English phrase ‘seal someone’s fate’ - a podcast by Jeff B. | PlainEnglish.com

For over a hundred years, the official definition of a kilogram was a metal cylinder held under three locks in France. But scientists have voted to change the kilo’s official definition to a mathematical equation based on unchanging laws of physics. For this reason, the prototype kilogram, called “Le Grand K” will no longer be the official definition of the kilogram. Plus, learn the English phrase “seal someone’s fate.”

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