People forget that settling Mars is not the same as early explorers settling the New World or Australia. Any human can live pretty much anywhere on Earth. You breathe the same air everywhere, and no matter where you go, whether Australia or Tierra del Fuego, you can hunt and forage for food. You are free to roam and migrate to favorable climates when the seasons change. You can live alone as a hermit or live with a group anytime you please. You depend on the Earth's natural environment for survival.<br /><br />On Mars, however, the human body will never adapt to or depend on the natural environment (except for the low gravity and changes in daylight). The human body will only adapt to living in confined artificial habitats, under the protection of expensive life support systems. These habitats will, no doubt, simulate Earth's environment. The human body is never going to breathe Martian air, touch Martian rock (except in an artificial habitat), or see the Sun and sky without some protective visor. In other words, it will never be the human body that will conquer Mars, it will be the artificial life support systems that will conquer Mars. That takes a lot of the fun and romanticism out of settling Mars.<br /><br />I would like to be proven wrong, but I don't think most humans want to live the rest of their lives in small confined artificial habitats, and have their bodies dependent on life support systems. Cabin fever, disease, awkward relationships, and the inability to have total individual freedom will be some of the few things that would destroy these settlements. You want to literally be on life support for the rest of your life?<br /><br />Remember, the main reason people want to "escape" from civilization is to have FREEDOM! People want to be free to move about, free to live with whomever they please, or freedom to survive alone. If you want freedom, Mars is the LAST place you want to be! You will never be free on Mars. You will forever be shackled to the artificial