A new mathematical approach uses data on people's commutes between and within U.S. counties to identify important geographic regions. Mark He of the University of North Carolina at Chapel Hill and ...

Regional identities and their statistics do not always neatly align. This is especially true in the mid-Atlantic and northeast United States, where regions frequently overlap jurisdictions. New York ...

The South American country of Colombia is one of the most geographically diverse countries in the world. It is made up of 5 completely distinct regions which range from the tropical amazons rainforest ...

Years ago, I found a book that redrew the map of our country as if the states had been defined by geography and culture rather than politics. I haven't been able to re-find the volume, yet the notion ...