The Smithsonian National Air and Space Museum’s STEM in 30 series of live, fast-paced, 30-minute webcasts are designed to increase interest and engagement in STEM for students. This episode of STEM in 30 explores the engineering behind various techniques used in the past to land spacecraft on other planets, including rocket thrusters, giant airbags, and a sky crane. The episode also examines what techniques might be used for future missions.