Nice job on #20, and welcome to FR. I particularly like your line about science being “the art of becoming ever less wrong.” I used to say something like that in discussions with a friend of mine who was into those Late Great Planet Earth books. He’d say “Scientists used to think the earth was flat!” and I’d reply “For most earthbound practical purposes, the earth *is* flat.”
Asimov wrote an essay called the relativity of wrong where he pointed out that, on average, the earth is off from being perfectly flat by 0.000126 miles per mile.
That is roughly 8 inches per mile.