Awesome visualization of U.S. newspaper presence

Per some of our recent ENG 2353 discussions, I ran across this simple-but-great visualization illustrating the presence and coverage of newspapers in America's history. The data comes from a study by the Library of Congress, and has options for several different drill-downs. Check it out:

The Growth of US Newspapers, 1690-2011 from Geoff McGhee on Vimeo.

(via Chart Porn)