Phoenix data found life on Mars may have new clues.

Key words: life on Mars Phoenix leads <P> </ P> <P> World Scientific reports [tech.]: According to NASA's Space Network 2 reported, although the "Phoenix" Mars landers detect the end of last November .task, but scientists are still carefully study the data it sent back. .They derive a surprising finding is that every night the atmosphere of Mars for some time in the water vapor will penetrate the soil. .A researcher believes that this suggests there is a thin layer of water, like dew in the previous climatic conditions on Mars to support life survival. .</ P> <P> </ P> <P> Mars research </ P> <P> 2008 年 5 25, "Phoenix" was successfully landed in the Martian surface. .The Arctic Mars landed in the first task, track tasks previously found buried in the ground here with ice. ."Phoenix" mission not only confirmed the existence of Martian North Pole under the ice surface. .But also on the Martian soil for analysis, view the past of Mars is not more humid than it is now, and use of soil thermal properties and electrical conductivity detector (TECP) spacecraft found near the water sign. .NASA Ames Research Center, said Aaron Bryant, soil thermal properties and electrical conductivity probe "is like the Swiss Army knife." .The detector has four branch fork can be inserted into the soil to measure soil moisture and temperature. .In addition, it is equipped with a sensor to measure relative humidity. .</ P> <P> "Phoenix" mission in those days, most humid air of Mars, when, when the vapor pressure is 2 kPa, about the water pressure than the low-Earth 100 to 1,000 times. .Every night from 20:00 (local solar time), the activity of water vapor in the atmosphere slowly disappear, to about 2:00, Mars water vapor in the air to reach the minimum value, only 1% of the total water vapor during the day. .In addition, the surface of Mars every night the temperature dropped nearly 50 degrees Celsius. .Bryant said: "Nobody anticipated the Martian soil will absorb as much moisture in the atmosphere." In the end the task, some of the moisture lost in the form of frost in the morning there, but most apparently were dry Martian soil absorption .the. .</ P> <P> </ P> <P> the formation of water film </ P> <P> Point at the recent American Geophysical Union meeting on the results of his discovery of Martian water cycle is introduced. .He and his colleagues calculated the current Martian soil in the end not absorb much water, because the soil thermal properties and electrical conductivity probe measurements of soil moisture has not reached a final conclusion. .However, Bryant has already guessed what the outcome will appear. .Water molecules in the air condenses on the surface of soil particles form a thin film. .This phenomenon is not unique to Mars, as long as there is water around the air, anywhere, can form such a water film. .Sometimes these films will be compiled into a drop of water (dew) or ice crystals (frost). .But those on Mars or the water film never becomes a real solid liquid. .Bryant said these Martian water film as "not cold water." .Bryant said: "It's the same everywhere, although not as liquid water flow, but the liquidity is better than ice. This thin layer of water film enough to make chemicals react, for some biological survival." </ P> <P> .Bryant and others interested in the reason for this water film is that when the temperature reached below zero on the earth after such a water film provides a habitat for microbes. .Bryant said, for example, researchers found that the Earth temperature as low as minus 20 degrees Celsius most about the cold desert - Antarctica Dry Valley (Dry Valleys of Antarctica) in very dry soil there is a large number of micro-organisms. .In this low temperature, not cold water film thickness is only about a few nanometers; little thinner than the outer layer of micro-organisms. .</ P> <P> </ p>.