Eric Walker added Ion Propulsion – A Plane with No Moving Parts [video] | Hacker News to Aerospace engineering
Eric Walker added Ion Propulsion - The Plane With No Moving Parts to Aerospace engineering
Eric Walker added a number of topics and a number of links to Aviation and aeronautics, and added Aviation and aeronautics to Transportation and locomotion
Eric Walker added a number of links to Aerospace engineering, and added Aerospace engineering to Aviation and aeronautics and Engineering
Eric Walker added Civil engineering, Aerospace engineering and Nuclear physics and engineering and a number of links to Engineering, and added Engineering to Science, engineering, mathematics and the humanities