A Railroad-Mounted "Printer" That Covers Its Tracks in Laser Graffiti

If you live in San Francisco, you may have seem some otherworldly lights radiating from the train tracks near your house this summer. If so, you can take off your tin foil hat: It was just the latest project of Aaron Koblin, the Creative Director of Google’s Data Arts Team, and director Ben Tricklebank. »9/13/13 6:20pm9/13/13 6:20pm