Tell us an interesting random fact you stumbled across (Part 2)

There was an old thread discussing change ringing, though it didn’t get into that much detail. It’s much more common in the UK, but I was an American change ringer years ago, and briefly tower captain at the Old North Church in Boston. If anyone’s interested in more in-depth discussion of change ringing, I suggest a new thread. I mostly lurk because my day job and my math keep me busy, but I’d try to actively participate in such a thread.