The importance of water was mentioned earlier; however, new light is shed on the subject when thinking about the present. The main problem with water on Mars is the lack of pressure needed to keep the water liquid. The decrease in pressure has occurred over billions of years due to atmospheric erosion and other potential causes. Currently, our main theory is atmospheric erosion; however, it may not be responsible for all atmospheric losses. Research has shown that over 3.5 billion years, up to four millibars of CO2 as well as several centimeters of water can be lost to solar winds. This change in atmospheric pressure was relatively rapid and could have made it very difficult for life to survive if it existed in the first place. All of these problems paint a bleak picture of life on Mars today, but that doesn't mean it's completely impossible. New light has been shed on the possibilities for life currently living on Mars, both by our latest rover and by discoveries here on Earth. On Earth, scientists discovered Achaia and bacteria in the Earth's subsoil. These microbes live on the hydrogen released by rocks and geothermal activities deep within the earth (Chapelle). These findings gave researchers hope that the same types of organisms could exist on Mars today. These are very promising options for life not only on Mars, but also on other celestial bodies. Of course, there is the issue of liquid water that must be considered, but what one will find is that even under a few feet of soil pressure, the soil pressure begins to decrease. increase considerably. Under these pressures, it is possible for water to exist in liquid form, particularly in areas of warmer geothermal activity that... middle of paper ...... claim system design. " Proceedings of the International Conference on Environmental Systems (1999). Pollack, James B., et al. “The Case for a Wet, Warm Climate of Early Mars.” Icarus 71.2 (1987): 203-224 . Redd, Nola Taylor. “Water on Mars: Exploration and Evidence.” September 26, 2013. SPACE.com. April 2, 2014. Sample, Ian. “Curiosity finds ancient riverbed on Mars.” September 28, 2012. The Guardian. April 12, 2014. Sidharth, BG and BM Birla. “In defense of abiogenesis.” Journal of Cosmology 1 (2009): 73-75. The first life on Earth. April 13, 2014. Wall, Mike. "Curiosity Rover Makes Big Water Discovery in Mars Dirt, a 'Wow Moment'." September 26, 2013 SPACE.com April 13, 2014. Winter, Lisa “What Was Mars Like When It Had Water?” » November 13, 2013. IFL Science April 13. 2014 .