David Strayer, a cognitive neuroscientist at the University of Utah, noticed he gets his best ideas when he’s in the wilderness for three days, so he decided to study what he calls the Three Day Effect. Florence Williams, author of The Nature Fix, takes him on a hike to learn more about what this research shows. She meets up with others who we’ll be following in this series, including veteran and activist Stacy Bare and writer Eric Weiner, who would much rather be darting in and out of cafes than river canyons. Florence, herself going through a divorce, signs on for a three-day research trip in the wilderness, hoping the emotional benefits will rub off.

Can three days on a wild river help cure veterans with PTSD? In this chapter, Florence Williams alights on Utah's Green River with a group of veterans and the scientists who are studying their brains outside, including Stacy Bare from chapter one and researchers from the lab of David Strayer, cognitive neuroscientist at the University of Utah. Florence and the veterans talk about trauma and resilience while rafting, hiking and undergoing a series of experiments. They look at their brain waves over time and also test their cognitive performance.

How do you convince a city boy to like camping? By taking him to a killer glamping spot, and then sticking electrodes on his body. Florence, joined by a behavioral psychologist, is determined to explore whether writer and urban proselytizer Eric Weiner, author of The Geography of Genius, can find creativity outside the city. Can they prove it by monitoring their nervous systems with the tools of the laboratory?