The kilogram finally has a precise meaning despite defying a rigorous definition for over a century. Delegates of the General Conference on Weights and Measures unanimously voted Nov. 16 in favor of a ...

If scientists had sacred objects, this would be one of them: a single, closely guarded 137-year-old cylinder of metal, housed in a vault outside of Paris. It is a prototype that precisely defines a ...

From being used in science experiments to weighing everyday objects, the kilogram has been a useful unit of measurement that has remained unchanged for more than a century now. That run could be ...

This video will help your child solve problems of measurement and measurement conversion. WSKG is here to help you help your child understand the basic concepts of the common core curriculum with our ...

A new definition of the kilogram is required, an international team of scientists contends. The current one is imprecise, they say, because it is not linked to an unvarying property of nature. The ...