"I'd say Brian, from his posts, is a pretty good earth scientist."

Thank you. But I know I have numerous gaps in even my basic knowledge.

BTW, I could handle the singing, so long as I know the song. And I could probably play a few on guitar, depending on folks tolerance for what I know how to play. (But who doesn't like a little Pink Floyd?)

Speaking of flat earthers, that's the wikipedia picture of the day: