Volker Maiwald, executive officer and habitat engineer, left, helps Matt Cross, Rover engineer of Crew 125 EuroMoonMars B mission, put on a simulated space suit before the crew exits the habitat to collect geologic samples to be studied at the Mars Desert

Volker Maiwald, executive officer and habitat engineer, left, helps Matt Cross, rover engineer of Crew 125 EuroMoonMars B mission, put on a simulated space suit before the crew exits the habitat to collect geologic samples to be studied at the Mars Desert Research Station (MDRS) outside Hanksville in the Utah desert, March 2, 2013. The MDRS aims to prepare for a human exploration of Mars using the desert location’s Mars-like terrain and appearance to simulate working conditions on the red planet. Scientists, students and enthusiasts work together to develop field tactics and study the terrain whilst wearing spacesuits and carrying an air supply pack and live together in a small communication base with limited space and supplies. Picture taken March 2, 2013. REUTERS/Jim Urquhart (UNITED STATES)