In the balance: scientists vote on first change to kilogram in a century

For the band of specialists in the much-overlooked arena of metrology, it will be the most profound moment in more than a century. Since 1889, one of the pillars of the science, the kilogram, has been defined by a lump of metal held in a triple-locked vault in a lab on the outskirts of Paris. It is the one true kilogram in the world.
Read more: https://amp.theguardian.com/science/2018/nov/09/in-the-balance-scientists-vote-on-first-change-to-kilogram-in-century?source=Snapzu