SEVENTY

Wow. Robin, that is so cool. -K
Isn't it, though? It's called a Foucault's pendulum. Hard to tell the size of it from the picture, but the ball itself weighs about 240 lbs. It knocks one of those little blocks down roughly every 15 minutes due to the earth's rotation;the pendulum swings from a fixed point. Though it seems that if the earth were rotating, that the pendulum would too. Can't wrap my brain around that. Perhaps that's why I teach English. Wish I had carried the zoom lens with me to capture the reflections better, but I still like how the pic turned out. -R