The kilogram may finally get a break from its yo-yo diet. An international team of scientists is closer to redefining the unit of mass based on fundamental constants, instead of a piece of metal in ...

Add articles to your saved list and come back to them anytime. SECURELY tucked away inside a French vault is a lump of metal known as the International Prototype. A mixture of platinum and iridium, it ...

Australian scientists and optical engineers will be making a perfect sphere that may one day redefine the kilogram -- and they have taken delivery of the cylinder of silicon from which it will be made ...

The prototype kilogram – to which all scales are calibrated to – is losing weight. International efforts are striving to redefine the base unit for measuring mass and, in future, redefine the kilogram ...

Scientists are hoping to redefine the kilogram by counting the number of atoms in the roundest objects ever made. The kilogram is the only base, or SI, unit still defined by a physical object, a bar ...

Scientists are hoping to redefine the kilogram by counting the number of atoms in the roundest objects ever made. So for the first time, a kilogram would relate to a universal constant, which by ...