The definition of the kilogram is still a chunk of metal. Machined from a chunk of a virtually indestructible platinum-iridium alloy, the international prototype kilogram (IPK) was built to last ...

Out of this meeting, the kilogram—or at least the idea of a standard unit of mass—was born For more than a century, the kilogram has been defined by the weight of a cylinder of platinum-iridium at the ...

Deutsche Bank analyst Edison Yu raised the firm’s price target on Iridium (IRDM) to $41 from $40 and keeps a Buy rating on the shares. Published first on TheFly – the ultimate source for real ...

For the units of length and weight that are widely used in daily life, the standards in Japan were the "prototype meter" and the "prototype kilogram" made of alloy (platinum 90%, iridium 10%) ...

Graphene could one day be involved in a new definition of the kilogram. To the left of gold in the periodic table are two elements — platinum and iridium — that are just as interesting in many ...