Kilogram set to be redefined, heralding a new era of measurement

https://www.abc.net.au/news/science/2018-11-16/the-definition-of-the-kilogram-is-about-to-change-heres-why/10502194?smid=Page:+ABC+Science-Facebook_Organic&WT.tsrc=Facebook_Organic&sf202432886=1