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Mass and Moles

Deep underground in a vault beneath Paris lives the most important lump of metal in the world - Le Grand K. Created in the 19th century, it's the world's master kilogramme, the weight on which every other weight is based. But there is a problem with Le Grand K - it is losing weight. Professor Marcus du Sautoy explores the history of this strange object and the astonishing modern day race to replace it.

Deutsch English svenska Magyar
  • Originally Aired June 17, 2013
  • Runtime 60 minutes
  • Content Rating United States of America TV-G
  • Network BBC Four
  • Created January 13, 2019 by
    Administrator admin
  • Modified January 13, 2019 by
    Administrator admin
Name Type Role
Mike Cunliffe Director