Units of mass

Why the Kilogram Is Getting Heavier

What exactly is a kilogram?  The best way to find out is to peer into a vault maintained by the International Bureau of Weights and Measures in France. Inside that vault rests a cylindrical chunk of metal known as the kilogram “standard.” It’s been there since the late 1800s, and it serves as the authoritative kilogram. […]

The World

Gold prices plunge to $1600 per ounce

In this market, all that glitters is gold