a beautiful–and extremely controversial–map made by John Wesley Powell, the intrepid explorer and leading natural scientist of the late nineteenth century. Powell undertook a large-scale survey of the far west to demonstrate that the region was made up of interdependent watersheds, or what he termed irrigation districts. With his team, he measured the flow of water across one billion (that’s right!) acres of land in order to determine the shape of the landscape’s most precious resource.
The Most Educated Town in Each State, western side. Map by Business Insider's Andy Kiersz, who used data from the Census Bureau's 2008-12 American Community Survey to determine the most educated town in each state. "educated" is defined as the percentage of adults over 25 with at least a bachelor's degree.| Mental Floss