Professor SAPOLSKY: Well, because at some point, I kind of have to sit there and look at my own 40-year-old self and in terms of openness to new experience, it was not a pretty sight.

NPR: Does Age Quash Our Spirit of Adventure?

And I talked about the, you know, the experience of sort of going out in the woods and at first being afraid to leave sight of the buildings and people and later on it became being afraid to come back to the sight of buildings and people.

NPR: Rocky Mountain Activist Carole King

They just want to get the hell out of there, out of sight, to alleviate the sting of ridicule, and then they want to forget about the entire miserable experience.

NPR: Excerpt: 'Then We Came to the End'