Astronomers have found some significant evidence for liquid water to be existing on Mars. They found ice on Mars which made them conclude that a long time ago on Mars, there was a warmer atmosphere. Warmer atmosphere means that the ice was in a liquid form before. If there was water, then there must be some kind of life form on Mars. (Aliens??!!) 
Now the big question is "can humans move and live on Mars?" Well the answer may have to be a "no". The reason for that is because on Mars, the ground is made of mostly iron. We can't plantcrops on there. We'll have to send in food supplies from Earth to Mars. The atmosphere on Mars is about -81 degrees Fahrenheit. I don't think humans can live through the harsh weather. Also, Mars' atmosphere contains of mostly carbon dioxide. We'll have to use oxygen tanks to survive. It's going to be very uncomfortable when we go to sleep. The gravity on Mars is lower than Earth's gravitational pull, so the houses on Mars might have to be an underground home. If we have real houses on Mars, they might get blown away by wind storms and even float in the air.
Living on Mars sounds awesome, but we have to face the facts. We can't survive there. There is no way we can grow crops there, no oxygen, and there are super cold temperatures on Mars.
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