"Chinese recreational innovations: chess, fireworks, fishing, pole and hook, hot air balloon, kite, and parachute."
Didn't know all of these! Knew about fireworks, chess, and possibly the stuff regarding fishing!
"Ulcers are not caused by spicy foods or stress. Helicobacter pylori, a spiral-shaped bacterium that thrives in the stomach's acid environment, causes nearly all peptic ulcers."
Yep, totally didn't know this at all!