Next year, the kilogram will be officially redefined but don’t worry it won’t change how much a kilogram is, only how we actually measure it. The rest of this article is behind a paywall. Please sign ...
Using a state-of-the-art Theta-probe XPS machine, experts in the UK have shown the original kilogram is likely to be tens of micrograms heavier than it was when the first standard was set in 1875. And ...
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