April 9, 2013 5:30 PM
The private Inspiration Mars Foundation is planning to develop a spaceship to travel to Mars and back starting in 2018. However, if the project isn't completed by then, the next window for travel won't be until 2031. Besides developing systems, equipment and a fail-safe route to the Red Planet, they also must find a married couple willing to spend up to 18 months in a cramped spacecraft. Brett Larson has the full details on the mission.