measurements
The Definition of a Kilogram Just Changed Worldwide
The kilogram is the last unit of measurement to be untethered from an artificial object.
Inside the High-Tech Lab Where Scientists Are Redefining the Kilogram
The watt balance will tell us what a kilogram is.
Is the Leap Second Good or Bad? We Have Until 2023 to Find Out
A decision to abolish the leap second has been delayed so that potential effects of its elimination can be studied.
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Why the Whole World Is Fighting Over the Leap Second
Enjoy today’s leap second, it could be one of our last.
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