The American Kilogram — Veritasium The US signed the metre convention and bases all customary units on SI standards. As an aside, the Utah constitution from 1895 required the metric system to be taught in schools. This requirement was repealed in 1987. ¯ Facebook Prev Article Next Article Discover Checkout these cool gadgets... Related Posts The Machine Used to Type Fast in Court Rooms Why You Shouldn’t Fear Artificial Intelligence How Evolution Punishes The Selfish What happens on the internet in a second Could You Actually Have An Anxiety Disorder? Why Does Mars Have Blue Sunsets?