ELON MUSK: “You can go to the Moon pretty much anytime, and it only takes a few days to get to the Moon, whereas it takes about six months to get to Mars. So that’s why we can do the Moon faster than we can do Mars. But I think probably, if things go well, we can probably send the first people to Mars in about five years, and then rapidly increase. So every two years, we would dramatically increase the number of ships going to Mars.”