Oliver Lovell on Twitter: "This is pretty exciting. On May 20th this year a whole heap of SI units are going to be re-defined in terms of physical constants. Definitely a day
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![7 SI Units] Standard Units of Measurement || All SI Units ~ Wiki Of Science](https://1.bp.blogspot.com/-oicwUoTq2k0/XD-V8h6kGTI/AAAAAAAABgM/KYhBLB1mm-wwIUpWVQ6rATNiZRDSENDsQCLcBGAs/s1600/Relations_between_new_SI_units_definitions.jpg "7 SI Units] Standard Units of Measurement || All SI Units ~ Wiki Of Science")
7 SI Units] Standard Units of Measurement || All SI Units ~ Wiki Of Science
2019 redefinition of the SI base units - Wikipedia
