Comment Re:Wrong optimization (Score 1) 105
It is basically impossible to make a return trip to Mars because of the fuel requirements, which is why there has not been any manned missions, and will likely not be any in the near future. It takes a lot of fuel to deliver a very small amount of fuel to Mars. There'd have to be a long series of fuel delivery flights before a manned mission. For those, fuel efficiency is of course priority one.