The official definition of a kilogram – as well as a few other SI measurements – ...

The official definition of a kilogram has been changing for well over a century, but this week it may be redefined for the final time. After years of debate and discussion, scientists from around the world are meeting in Paris on Friday to vote on whether the kilogram, the mole, the ampere and the kelvin should be changed to more stable and reliable definitions.

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Category: Science