For more than a century, a single metal cylinder in a Paris vault quietly defined what a kilogram was. After 130 years, ...

A replica of the International Prototype Kilogram is pictured is seen at the 26th meeting of the General Conference on Weights and Measures (CGPM) to vote on the redefinition of four base units of the ...

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 ...

Most people know how much a pound weighs — 16 ounces. The worldly among us may know that a kilogram is 2.2 pounds — or 1,000 grams. But do we really know what these numbers mean? Agreeing on units of ...

Scientists voted on Friday to redefine it based on electric currents. A replica of the International Prototype Kilogram is pictured is seen at the 26th meeting of the General Conference on Weights and ...

A kilo is a kilo is a kilo, right? Wrong. Monday marks World Metrology Day, and this year's edition sees a big change in the way the kilogram unit is defined. Other WRAL Top Stories In November last ...