Time and Navigation: How We Found Our Way in the World cdn.theatlantic.com/static/mt/assets/science/assets_c/2013/04/BondChronometer-thumb-570x791-118917.jpg The newest exhibit at the Smithsonian's Air and Space Museum explores the long history of path-making. Apr 14 2013 http://www.theatlantic.com/technology/archive/2013/04/time-and-navigation-how-we-found-our-way-in-the-world/274970/ [with comments]; http://timeandnavigation.si.edu/