This makes me wonder if we’ll ever put humans on Mars. The Aerospace Corporation Complexity Index dooms the mission to failure. It would be a genocide case we should attempt today. When I consider the mass to be conveyed to Mars in a manned mission - a couple of tons I imagine – I also think of the means available: machines that were conceived centuries ago and which were little improved in the last 70 years. I suspect that I will never see a man walking on Mars. Alackaday!