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 losing ...

Add articles to your saved list and come back to them any time. It turns out that our scales have been lying to us. Since the kilogram was standardised in 1889, the International Prototype near Paris ...

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 ...

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 ...

Next year, the kilogram will be officially redefined but don’t worry it won’t change how much a kilogram is, only how we actually measure it. The rest of this article is behind a paywall. Please sign ...

How much is a kilogram? 1,000 grams. 2.20462 pounds. Or 0.0685 slugs based on the old Imperial gravitational system. But where does this amount actually come from and how can everyone be sure they are ...