This post on social media is about the efficacy of social media.  After I put up a picture taken in Pittsburgh, I got a note from Kim Carlsen, who is married to my nephew Ben, and lives in Colorado.  Where are you, she asked, and when I sent her the details of our location at Powdermill Nature Reserve, she replied that she was visiting her parents in Berlin, PA, 30 miles away.

So the next morning she and her daughter Sarah came by for a brief visit.  Greta and her cousin Sarah went to watch some bird-banding, and to take a walk in the woods to get away from their parents, while Kim and I sat and had coffee.  It was an unexpected pleasure on our trip, and it wouldn’t have happened without Facebook.