Hacker News stories for 2 PM on Thursday Aug 22, 2013

0.930 Largest sites built with Ruby on Rails comments

0.410 Yahoo Tops Google for U.S Web Traffic in July, ComScore Says comments

0.271 The Man Who Invented Modern Probability comments

0.223 Light Table 0.5.0 comments

0.190 Why does NASA use gold foil on equipment and gold-coated visors? comments

0.034 Apple Buys Another Map App, Embark comments