Air Memes

The 7th and 8th elements on the periodic table are nitrogen (N) and oxygen (O), which together spell "NO" - precisely the answer you'd get from any chemist when asking if humans can survive without breathing air. Turns out our cellular respiration isn't just a suggestion. I once tried to explain this to a student who thought breathing was optional. Had to resuscitate them shortly after their "experiment." Tenure committee wasn't impressed.