Add Yahoo as a preferred source to see more of our stories on Google. Le kilogramme est mort. Vive le kilogramme! The U.S. National Institute of Standards and Technology called this Friday a “turning ...

The International Committee for Weights and Measures is about to reach a decision that could affect the teaching and understanding of basic science for the next hundred years. It has passed a ...

The official definition of a kilogram has been changing for well over a century, but this week it may be redefined for the final time. After years of debate and discussion, scientists from around the ...

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

VERSAILLES, France — In a historic vote, nations on Friday unanimously approved a ground-breaking overhaul to the international system of measurements that underpins global trade and other vital human ...

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 ...

We measure stuff all the time—how long, how heavy, how hot, and so on—because we need to for things such as trade, health and knowledge. But making sure our measurements compare apples with apples has ...

Despite having weighed myself in kilograms for quite some time, I've never really contemplated exactly who or what decides what a kilogram is (other than, obviously, being 1,000 grams). But it turns ...