Morning Overview on MSN
Why scientists killed the old kilogram after 130 years and rewrote the standard
For more than a century, a single metal cylinder in a Paris vault quietly defined what a kilogram was. After 130 years, ...
It’s mass for the masses. A tabletop device makes the new definition of the kilogram more accessible. Previously, the kilogram had been equal to the mass of a special metal cylinder kept in a vault ...
Some results have been hidden because they may be inaccessible to you
Show inaccessible results