Shipping bricks to Mars is a nonstarter. Every pound launched from Earth carries a huge cost, and if we were to build a crewed outpost on the Red Planet, we would need a lot more than a few bags of ...

In this photo taken on Saturday, April 18, 2015, Bastien Mathurin, crew commander, of Crew 153, stands next to a planted Belgian flag outside the Mars Desert Research Station, in Hanksville, Utah.