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.
Why the Whole World Is Fighting Over the Leap Second
Enjoy today’s leap second, it could be one of our last.
Just How Big Are the Biggest Sea Monsters, Really?
We have a tendency to exaggerate.