A line of cities stretching from San Antonio to Winnipeg marks a cutoff of population, with 80% of Americans living on one side, and a mere 20% on the other. Today on That Is Interesting, we explore population patterns such as this across the globe. Music: Cinematic, Inspiring & Emotional Background Music For Video, Film, Documentary by Ayepeid Music Image and Info Sources: https://docs.google.com/document/d/1M…