But this one isn’t a coinicidence - the idea of having the unit of length be the length of a seconds pendulum predates the meter we have. (It doesn’t work because the period of a pendulum depends on your latitude.)
You're kidding me! That's a fact I had no idea about. I thought I was damned clever for having figured out the thing as a child and then found out all the other kids knew it too. I never thought to check the origin. Made my day. Thank you.
