This is the reason that finding a source of Martian water is so important.

Since a gallon of water weighs 3.8 kilograms, the cost of bringing a gallon of water to Mars could be about $171,000. New findings from NASA's Mars Reconnaissance Orbiter (MRO) provide the strongest evidence yet that liquid water flows intermittently on present-day Mars. However, the planet seems to have been warmer and wetter in the past. Also, it was stretched into the northern hemisphere of the planet.

This article is more than 4 years old. The planet's atmosphere and temperature make the idea of liquid water seem impossible. Water from Mars Extracting the Water on Mars from Soil. Mars is replete with water, but most (if not all) of it is in frozen or vapor form. There is no liquid water. Liquid water may still flow on Mars, but that doesn't mean it's easy to spot. Mars is in the middle of an ice age, so liquid water cannot exist on its surface at the present time. This is the reason that finding a source of Martian water is so important. There may be flowing water on Mars. George Monbiot. But until the Mars Reconnaissance Orbiter started circling the planet and the Phoenix Mars Lander landed on it, most people assumed that if Mars once had liquid water, it hadn't for some time. Although there have been a few ideas on making clean water from Mars, there are really only two options: Extract it from the soil, or; Extract from the polar ice caps; 2.

NASA Confirms Evidence That Liquid Water Flows on Today’s Mars | NASA No liquid water can exist on Mars, as the surface temperature is too cold. To explain the water story, I'll need to explain the instrument. The conditions on the planet's surface do not support the long-term existence of liquid water. Martain soil has trace amount of water in it. But is there intelligent life on Earth? For instance, ice caps the planet's poles, and patches of ice lie over dunes in craters [source: Fountain ]. Moreover, it was bigger than the Arctic Ocean present on earth. Investigations in this NASA Educator Guide explore the question of whether there is water on Mars. We've known that since the days of Viking. Since a gallon of water weighs 3.8 kilograms, the cost of bringing a gallon of water to Mars could be about $171,000. ----- We (science) doesnt know for sure yet. There was an ocean on Mars, wreathes the 20% surface of the mars. This ocean had a maximum depth of around 5000 feet or approximately 1.6 miles deep. MARSIS transmits radio waves at Mars using a pair of booms, each 20 meters long, which extend on each side of Mars Express. However, the planet seems to have been warmer and wetter in the past. There is less water on Mars compared to Earth. Most of the water known is in the cryosphere (permafrost and polar caps). The radio waves bounce off of Mars, and MARSIS measures the time it takes for the waves to travel there and back.