It’s official: We’re redefining the kilogram
Soon, our system of measurement will rely only on fundamental constants
![Le Grand K](https://i0.wp.com/www.sciencenews.org/wp-content/uploads/2018/11/111518_ec_si_feat.jpg?fit=860%2C460&ssl=1)
SPECIAL K Carefully secured under bell jars, a metal cylinder known as Le Grand K defines the kilogram. Now, scientists are doing away with that benchmark, instead relying on a fundamental constant, the Planck constant, to define the kilogram.
Courtesy of BIPM