On 16 November 2018 metrologists and policy-makers from 60 countries around the world gathered at the General Conference on Weights and Measures (CGPM) in Versailles, France. Member states made history by voting to adopt the most sweeping change to the International System of Units (Système International, or SI) since its inception in 1960. The change included new definitions for a number of fundamental units, perhaps most significantly the kilogram.
Find out more about the historic changes in this article by science writer Benjamin Skuse, taken from November’s Physics World. Find out how to access that issue here.
