The kilogram is being redefined as a fundamental constant, not just a chunk of metal

The kilogram is being redefined as a fundamental constant, not just a chunk of metal

https://www.technologyreview.com/the-download/612442/the-kilogram-is-being-redefined-as-a-fundamental-constant-not-just-a-chunk-of/?utm_source=newsletters&utm_medium=email&utm_campaign=the_download&utm_source=MIT+Technology+Review&utm_campaign=45de03fbf9-EMAIL_CAMPAIGN_2018_11_19_12_39&utm_medium=email&utm_term=0_997ed6f472-45de03fbf9-153856085