Okay, Mark. get what: Climate Change creates rapids (as in panel 4)? I don’t see an obvious connection. More water just makes deeper rivers. As far as I am aware, rapids are due to changes in the inclination of the riverbed, along with the narrowness of a river section and the state of the riverbed (i.e., rocky). More water could lead to rapids, I presume, if there was not enough water to begin with. Have to agree with Mark about the gator migrations.
Still, I’m surprised Duke didn’t push Mark into the river after going into “Professor Trail” mode. Too pedantic and patronizing. I know, because my wife feels the same way about me.
Of course, Duke gave Mark his opening, as if he was one of those kids that used to show up on the Mr. Wizard television shows of the 1950s. This passage should have been presented in a more conversational or story-telling manner, rather than as an abbreviated version of the Sunday lectures.