| Today is [[http://www.worldmetrologyday.org/|World Metrology Day]], and we have a new kilogram standard! Here is a [[https://www.vox.com/science-and-health/2019/5/17/18627757/kilogram-redefined-world-metrology-day-explained|Vox article]] that does a reasonable job of discussing it (but note the error in the discussion of the units of Planck's constant!). | Today is [[http://www.worldmetrologyday.org/|World Metrology Day]], and we have a new kilogram standard! Read about it at the [[https://www.nist.gov/si-redefinition|National Institute of Standards and Technology (NIST)]] site. Here is a [[https://www.vox.com/science-and-health/2019/5/17/18627757/kilogram-redefined-world-metrology-day-explained|Vox article]] that does a reasonable job of discussing it for the layperson (but note the error in the discussion of the units of Planck's constant!). |
