Lesson #106

November 26, 2018

Scientists have re-defined the kilogram and France’s ‘Le Grand K’ retires

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."

Lingo

Headline-grabbing

If something is "headline-grabbing," it attracts a lot of attention

Expression

Seal someone’s fate

To "seal someone's fate" is to cause that thing to fail or die

Exercise

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Video

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Video lessons are available starting with Lesson 179.

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