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Mars temperatures range from +80 F to -207 F
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That is the real problem with putting men (and fertile women I hope) on the surface of Mars. I wonder if they sent a digging machine and dug down deeper if it would be a better habitat for humanity. Just add solar panels and if they could find water in the rocks filter it and purify it like on nuclear submarines and extract the oxygen to breathe.
Mars Climate:
http://quest.nasa.gov/aero/planetary/mars.html
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Scientists think that the climate on Mars 3.5 billion years ago was similar to that of early Earth: warm and wet. But because of chemical reactions between Mars' carbon dioxide atmosphere and water, most of its carbon dioxide was used up forming carbonate rocks. Earth is big enough and active enough that it has plate tectonics which recycles this carbonate back to carbon dioxide. Mars is too small (10 times less massive than the earth) and does not have any recycling of its carbonate. So now the Mars atmosphere is very thin, the temperature is very cold, and what water remains is either frozen in the Martian poles as permafrost or hidden in deep underground springs.
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