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 ...

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 ...

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 ...

If several scientists get their way, a 2.2-pound hunk of metal -- the international prototype of the kilogram -- may soon be out of style. Like its six basic-units-of-measurement siblings before it -- ...

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 ...