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Veritasium: Season 2017

2017x19 How We're Redefining the kg
TV-G

  • 2017-07-12T04:00:00Z on YouTube
  • 10m
  • Canada
  • English
  • Documentary, Reality, Talk Show
In 2018 the kg will be defined by Planck's constant, not a hunk of metal.
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