Tuesday 22nd February 2022, 2.40pm (day 3,834)

For the first three weeks of this semester I have been giving some classes in the Chemistry building, where resides this interesting display: I’m sure you realise what is going on here. As today was the last of these three classes, and I may never come back in here again, I thought I would capture it while I had the chance. They have omitted to include examples of the radioactive elements, but that’s probably a good thing.
22/02/2022 was today’s date, and a Twosday too: so Radon, to bottom right, perhaps is the most representative of these.