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 ...

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. In November last year, scientists and ...

Amid the ideological and religious upheavals of the last 200 years, the metric system has spread around the world as an exemplar of science and rationality. But in both its champions and detractors, ...

The National Institute of Advanced Industrial Science and Technology (AIST) showed Japan's meter and kilogram prototypes to the press on Monday, ahead of the 150th anniversary later this month of the ...