Didn't see any threads about mars colonization, so thought I'd start one for my pet idea. The goal of this thread is to come up with a plan for sending people to mars that is as sustainable as possible, as quickly as possible, and as cheaply as possible. We can start with something similar to Mars Direct, using reasonably short term technologies like the Falcon Heavy Lifter and Dragon Capsule from SpaceX. Math I've seen says we can get about 8 metric tons to martian surface using fully propulsive landing and modified Dragon Capsules. Assume we can send at most say two landers per launch window (about every two years). Since we want to establish a permanent base and have limited means, it seems to me that it would be far far cheaper to find an astronaut that is willing to live on mars for the rest of their life than it would be to waste a launch on the earth return/ mars ascent vehicle. Not bringing that means we don't need to figure out how to bring several tons of cryogenic hydrogen along with us. Instead for isru water and air we can likely get along with the much slower method of collecting what little water is in the air. Of course for most real industry we will need lots of water, which means either wait a long time and recycle well, or go out and find some ice. More tomorrow.