For over a century, the kilogram was defined by a single, shiny lump of metal locked in a vault near Paris. But what happens when your definition of mass starts...losing mass? In this episode, Tom Whipple, Science Editor at <em>The Times</em>, unpacks the surprisingly dramatic story of the kilo - from the French Revolution’s quest for order, to a quantum reimagining of what “weight” really means. Enter the kibble balance: a machine so precise it can weigh light itself. Sort of.<hr><p style='color:grey; font-size:0.75em;'> Hosted on Acast. See <a style='color:grey;' target='_blank' rel='noopener noreferrer' href='https://acast.com/privacy'>acast.com/privacy</a> for more information.</p>
