A kilogram just isn’t what it used to be. The 118-year-old cylinder that is the international prototype for the metric mass, kept tightly under lock and key outside Paris, is mysteriously losing ...
Add articles to your saved list and come back to them any time. It turns out that our scales have been lying to us. Since the kilogram was standardised in 1889, the International Prototype near Paris ...
PARIS — A kilogram just isn't what it used to be. The 118-year-old cylinder that is the international prototype for the metric mass, kept tightly under lock and key outside Paris, is mysteriously ...
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