3. After Earth, Mars is the most habitable planet in our solar system due to several reasons. Gravity on Mars is 38% that of our Earth's, which is believed by many to be good enough for the human body to adapt to http://www.mars-one.com/faq/mission-to-mars/why-mars-and-not-another-planet Its has solar ice caps so if you want to drink water you could use a huge solar reflector to direct the suns light on to the polar ice cap and the it will surely melt. https://www.youtube.com/watch?v=o936fbSRlO8 https://www.youtube.com/watch?v=o936fbSRlO8 On Mars, water can be withdrawn from the soil. The rover will select the location for the settlement primarily based on the water content in the soil. We expect this to be at a latitude of between 40 and 45 degrees North. Water extraction will be performed by the life support units. The rover will deposit soil into a water extractor in the life support units. The water extractor will heat the soil until the water evaporates. The evaporated water will be condensed and stored, the dry soil expelled, and the process repeated to extract more water.