The International System of Units (SI Units), adopted in 1960, is the global standard for consistent measurement, replacing ...

October 18, 2010 marked the 50th anniversary of the International System of Units, also known as the SI System. Resolution 12 of the 11th meeting of the CGPM (1960) established the system as the world ...

Weighty matters: a platinum-iridium kilogram belonging to the US National Institute of standards and Technology. (Courtesy: J.L. Lee/NIST) Metrologists and policy-makers from 60 countries around the ...

Every measurement we make, be it for length, time, temperature, or electric current, needs a standard unit so that results ...

THERE’S a new way to weigh. For over a century, the kilogram was defined by a metal cylinder in a French vault. Now, this key unit of mass is defined using the Planck constant, a fundamental figure in ...