The kilogram — anywhere in the world, for any purpose — is based on the exact weight of a golf-ball-sized chunk of platinum and iridium stored under three glass bell jars in a vault in an ornate ...

Project Avogadro seeks to change the definition of a kilogram from the weight of a hunk of metal that currently resides in France to a measurement based on fundamental constants (like every other unit ...

DeskTech has launched a new desktop centrepiece in the form of a Kilogram Prototype to commemorate the change to the IPK which was retired earlier this month on May 20th, 2019. Watch the promotional ...

PARIS — A kilogram just isn't what it used to be. The 118-year-old cylinder that is the international prototype for the metric mass, kept tightly under lock and key outside Paris, is mysteriously ...