Open House With Stephen O'doherty

Do My Grams Look Fat In The New Kilo?

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Synopsis

Hold on to your hats! From next year there will be a metric makeover and the kilo will be defined by a number derived from Planck's Constant. So how can a number define mass? It is, as they say, complicated. Science communicator, Petr Lebedev ran Open House through the change.