Maybe it’s the weather.

(It’s really humid in Tucson right now, which is normal for this time of year.) Maybe it’s my back, which I injured while working on the lawn.

I don’t know what it is, but I’m in a real crappy mood. Not excited about work, can’t get into science, don’t really feel like reading anything. Ugh. Ugh. Ugh. I’ve got to snap out of this…