Stanford University dug into the Library of Congress’ “Chronicling America” project and put together this interactive visualization of over 140,000 American newspapers published over the last 3 centuries.

Drag the slider around and see the burst of newspapers spread from East Coast to West Coast with high concentrations where major cities sprouted up. Oh, and you can zoom in to any region in the US too to get a clearer view of those dots (because at some point they get really intense).