In case of sending humans to Mars than to send humans to the international space station because Mars is farther from the earth it want it takes longer, and if the man wants to live on Mars more than most. Because Mars is smaller than the Earth. Gravity is less than the world. It's a very thin atmosphere. The composition of the atmosphere is filled with carbon dioxide. This is not conducive to livelihood of human beings at all. It relies on data from the survey and exploration robot spacecraft missions are at present such data from the survey of vehicles that hit the Marriott Hotel queue on the Mars surface. Stores information about the geological conditions on Mars and spacecraft, many ships that collect information about the condition of the atmosphere in order to cause the event to lose the atmosphere of Mars, etc to cope with cruel nature on Mars.
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