The queue for coffee is still about 100 people long, but the conference is nearing its end. The sessions finish at noon today, and lots of the big name scientists have already gone home. The stands in the foyer have also been packed up.

That’s a shame because it means I’ve missed my chance to buy an APS t-shirt with a physics slogan. I would have chosen between “Don’t drink and derive” or, one that I haven’t seen before, “Flirt harder – I’m a physicist”. Maybe, thinking about it again, it’s a good thing that the stall has gone…