http://engineeringtv.com/blogs/etv/archive/2008/06/11/magnetically-actuated-micro-robots.aspxStudents at Carnegie Mellon University have employed external magnetic fields to controllably position and orient a magnetic micro-robot. They demonstrated this approach in the 2007 and 2008 RoboCup Nanogram Demonstrations. Imagine a mechanical Pelé orenCommunityServer 2007.1 (Debug Build: 20917.1142)