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Measuring Mass: The Last Artefact
What are the consequences if the object against which we measure all other things changes?
Measuring Mass: The Last Artefact Episodes
Episode 22-04-2023
Just outside Paris, inside a hi-tech vault, and encased in three vacuum-sealed bell jars, rests a small metallic cylinder about the diameter of a golf ball. \n\nIt may not look ...
22-04-2023
BBC 4
