How We're Redefining the kg

In 2018 the kg will be defined by Planck's constant, not a hunk of metal. Special thanks to the staff at NIST who made this possible: Darine Haddad, Jon Pratt, Stephan Schlamminger, and Ben Stein. I have been obsessed with measurement for a long time and I'm not sure quite how it happened. The...

10 min - Science & Tech - Veritasium

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