SpaceX's Elon Musk and Joseph Gordon-Levitt Talk Manned Mars Missions (Video)
Friday, January 31, 2014 - 12:10
in Astronomy & Space
Billionaire rocket-maker Elon Musk of SpaceX shared his big vision for a "self-sustaining civilization" on Mars with actor Joseph Gordon-Levitt in a short documentary set to air this weekend.