Happy #WorldMetrologyDay! With the revolutionary #SIredefinition in effect starting today, nobody in the scientific community has a case of the Mondays. Watch our Capital Emmys-nominated (yay!) video about the leadup to this momentous day. Get the backstory on each of the SI units of measurement and look toward a more precise future with us: https://www.nist.gov/si-redefinition | National Institute of Standards and Technology (NIST)