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 ...

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 ...

Deep underneath the Parisian suburb of Saint-Cloud, in a vault that can only be opened by three people wielding three different keys, there lies a hunk of metal that is so crucial to the world of ...

Meters, kilograms, degrees Celsius. To most Americans, these units of measurement are little more than funny inconveniences on trips abroad. To scientists, they’re the very standards that allow for ...

In the run-up to the Queen’s Platinum Jubilee celebrations, Boris Johnson is reportedly set to mark the occasion in a unique way that has divided opinion. A Cabinet source has claimed that the Prime ...