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 ...

SCIENTISTS HAVE SPENT the better part of the past four centuries, since the early days of the Enlightenment, discovering the truth about how the natural world works. A critical part of this endeavor ...

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 ...

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 ...

SINGAPORE — A kilogram is hard to fathom. It is a unit of mass, but humans can only sense force and not mass, hence the frequent confusion between mass and weight, which is a type of force, said Mr ...