The power went out at work the second time in a row; I'm guessing the local circuit blew from air-conditioner overload. Fortunately, we were just about to leave, so we were 90% squared away. In an uncommon display of fickleness, we had a 100 degree weekend a week after a 60-degree-and-rainy weekend.
I know the thesis of Guns, Germs, and Steel (I suppose I'll read it when my to-read list dwindles down to 15 or so), but I'll further a different theory.
I'm astounded that a place where it's a hundred-and-thirty degrees at night year round was the cradle of civilization, but it's no wonder Europeans have become so dominant in world culture. It's hard to devote time to science and art when you're napping all the goddamned time.