science
The Way We Define a Kilogram Could Change Next Week

The future of mass depends on a conference vote next week. Read More >>

science
The World’s Official Kilogram Is Losing Weight and That Might Screw the Metric System

We've long known that there were some issues with France's 'Le Grand K', the international prototype for what a kilogram really is. Made in 1879 from platinum and iridium alloy, it is the perfect standard for what a kilogram weighs. The problem is, it's losing weight. Read More >>