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Scientists to swap dirty old kilogram for something more stable
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Scientists to swap dirty old kilogram for something more stable
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Scientists to swap dirty old kilogram for something more stable

By Reuters
12 Nov 2018   |   3:26 pm   |   2m 5s
After years of nurturing a sometimes dusty lump of metal as the global reference for modern mass, scientists are to redefine the kilogram - ditching a relic made of platinum-iridium alloy for something more up to date.


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