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How many hours are there in a day on Mars? Can humans survive on Mars?

Mars has 24 hours a day. At present, people can't live on Mars.

Mars rotates once every 24 hours, 37 minutes and 22.6 seconds. A day and night on Mars is slightly longer than a day and night on Earth.

The atmosphere of Mars is thinner than that of the Earth, of which 95% is carbon dioxide, 3% is nitrogen and 2% is argon. The equatorial surface temperature of Mars is-1 13℃ at night and 7℃ at most during the day. The average annual temperature of Mars is about-58 degrees Celsius. Oxygen-free atmosphere, freezing temperature and dry surface have become the three major obstacles for human beings to move to Mars.