The remaining 90%, of course, inhabit the regions colored white. (That’s how math works!)
Using publicly available Census data, Business Insider's Walter Hickey and Joe Weisenthal have deduced that over half of America's population is localized to a mere 146 of the 3,144 U.S. counties and county-equivalents.
Even more mindblowing: said circle is mostly water.
Here's food for thought: Some cities are considerably more densely populated than others. Imagine packing all 6.9 billion people in the world into a city you know. How much space would that megacity take up?