I agree with others posting here. Your husband thinks he's just a little too smart. Is he shorter than you by any chance?
Jenny posted earlier about the possibility of you contacting the Guiness book. I like the idea of you turning his arguments right back at him. Of course, it would be good to keep a sense of humor about it, but he has to realize that you are not going to tolerate his superiority about this.
I have been known to yell at my wife but I know afterward that I have done wrong. Does your H experience guilt? He needs to.
Others may disagree with me, but I think you should consider telephone sessions with a C right here in the US of A. The Finn I am most familiar with is Huck, but from what you have told us, I'm afraid that your H's behavior might be considered quite normal there.
BTW, you are not on the edge of nowhere. You are near the north pole, the world revolves around YOU.