Presented by
Mapping the Cloud in 'Immaterials: Light Painting WiFi'
Sep 27, 2011 | Video by Timo Arnall, Jorn Knutsen and Einar Sneve Martinussen
Long-exposure photographs reveal the invisible wifi networks that permeate our urban environments
We want to hear what you think about this article. Submit a letter to the editor or write to letters@theatlantic.com.