Measuring Mass: The Last Artefact
BBC FOUR
Thursday 16 September 2021 02:30 - 03:25 (55 mins)
A piece of metal that defines the mass of a kilogramme has, over time, lost the equivalent of the weight of an eyelash. What are the consequences for how we measure our world? Also in HD. [S,SL]
Measuring Mass: The Last Artefact may be available on playback |
