World Metrology Day, where acceptance of these standards will be voted on. https://www.nist.gov/news-events/news/2018/11/historic-vote-ties-kilogram-and-other-

World Metrology Day, where acceptance of these standards will be voted on. https://www.nist.gov/news-events/news/2018/11/historic-vote-ties-kilogram-and-other-units-natural-constants https://www.nist.gov/news-events/news/2018/11/historic-vote-...