The other day…
Husband: Remember last year when the red maple swamp froze hard but it hadn’t really snowed yet and we could walk out there and find the beaver hutches and deer stands?
H: It’s like that right now. I was out there today.
W: Nice! I think I’ll check it out.
H: Be careful of falling through the ice.
W: You just said it was frozen hard.
H: Beavers make underwater tunnels to their hutches. They have underwater paths under the ice. You know about the Venturi effect?
H: Where there is a narrowing of the stream the velocity of the flowing water increases. The friction increases too and the water gets warmer. The beavers do it on purpose.
W: Right. So is it frozen enough to walk on, or it isn’t?
H: Oh it’s frozen alright. The dog and I were just out there.
W: Okay, then I’ll check it out.
H: Just be careful you don’t fall through the ice.