Dave Pell, in his excellent NextDraft newsletter, points to a couple of quick and entertaining links about cities.
First, from NPR, a fun way to figure out if you live in a city.
Second, from The Atlantic Cities, a short but entertaining look at cities that may or may not have been without air conditioning. Pretty scary stuff, when we think about the rapid increase in AC use in the developing world and the concomitant strain on power supplies and use of harmful, climate forcing chemicals.