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Kilogram
The kilogram is getting a new look
July 14, 2017
Culture
For now, the standard kilogram is a shiny little cylinder in Paris. Soon, that will change.
A kilogram just isn’t what it used to be — and it might never be again
July 25, 2015
Science
Official kilogram has put on a little weight
August 15, 2013
Environment
Why the Kilogram Is Getting Heavier
August 15, 2013