Space exploration is preparing to head to Mars. NASA wants to send humans there by the 2030s. For anyone brave enough to sign on, the flight itself could take from six to nine months. To survive would be a challenge for humans as Mars lacks running water and breathable air. In order to prepare for the eventuality, a number of mock Mars missions are underway to test human endurance. The CBC’s Paul Hunter went to see what they involve and what they are finding out.