Why Is It Hard to Make Friends Over 30?

I’m not sure why this article was in the Fashion and Style section of the New York Times, but never the less, I enjoyed it.  This line is poignant: 

“Basically, she suggests, this is because people have an internal alarm clock that goes off at big life events, like turning 30. It reminds them that time horizons are shrinking, so it is a point to pull back on exploration and concentrate on the here and now.”