The story about the antelope, featured in This American Life, follows Scott Carrier and his brother's attempt to prove a theory that humans evolved to be endurance runners, capable of outrunning animals like pronghorn antelope over long distances. Scott's brother, a biology student, hypothesizes that early humans could have run down big game without weapons by relying on their endurance rather than speed.
In the 1980s, they go to Wyoming to test this theory by attempting to chase down antelope in the desert. The idea is to exhaust the antelope by making them run in the heat for a long period. Despite their efforts, the antelope consistently outmaneuver and outrun them, blending into herds and splitting into different directions, making it impossible to follow just one.
Scott reflects on the challenges of the endeavor, the limitations of modern life, and the connection to a primitive way of living. Despite failing to catch an antelope, the story highlights the persistence of the human spirit and the desire to understand our ancient origins.