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connor240287
2008-Nov-08, 01:40 AM
FAYETTEVILLE, Ark. - University of Arkansas researchers have become the first scientists to show that liquid water could exist for considerable times on the surface of Mars.

Julie Chittenden, a graduate student with the Arkansas Center for Space and Planetary Sciences, and Derek Sears, director of the Space Center and the W.M. Keck Professor of Planetary Sciences, will report their findings in an upcoming issue of the Geophysical Research Letters.

"These experiments will help us understand how water behaves on Mars," Chittenden said.
Researchers have concluded that they may be water on the surface of Mars in the form of Brine

Based on previous experiments and hypotheses, scientists have speculated that pure water on the planet's surface would evaporate from solid to gas, bypassing the liquid phase, at the low pressures found on Mars - 7 millibars as opposed to about 1,013 millibars on Earth. However, the planet's surface sports features like gullies and channels that look as though they might have been created by the movement of liquid. Terrestrial experiments designed to simulate Mars-like conditions have been performed to help answer this question of whether or not liquid water exists on Mars, but until this point they have only been done with pure water at high pressures.

Chittenden and Sears used a planetary environmental chamber in the W.M. Keck Laboratory for Space Simulation to simulate the conditions found on Mars - an atmosphere of carbon dioxide, 7 millibars of pressure and temperatures from zero degrees Celsius to 25 degrees below - and examined the evaporation rates of brine solutions expected to be found on Mars. Most water on Earth contains salts that leech into the water when it comes in contact with soil, and similar processes might be expected to occur in any surface water found on the Red Planet. Salts in the water lower the freezing point of the solution.

Edit: Think i have put this in the wrong section, dident take a proper look at the other topics

01101001
2008-Nov-08, 02:35 AM
FAYETTEVILLE, Ark. - University of Arkansas researchers have become the first scientists to show that liquid water could exist for considerable times on the surface of Mars.

1) Please link to material so we can read it all in place, like this: University of Arkasas press release: Simulations Show Liquid Water Could Exist on Mars (http://dailyheadlines.uark.edu/5717.htm) (November 07, 2005)

2) This is old news, and similar has been referenced in BAUT Forum before. See topic Will the Phoenix Mars Lander find liquid water brines on Mars? (http://www.bautforum.com/space-exploration/68610-will-phoenix-mars-lander-find-liquid-water-brines-mars.html#post1142090) and topic Water on Mars (http://www.bautforum.com/astronomy/34723-water-mars.html). When you discover something old, and you want to bring it to our attention, check to see if it has already been brought to our attention. If so, and you have more to add, add to the existing topic.

Thanks.