researchers say

???? the new British "natural period of · a research study" the report in the Journal said, from the analysis of Martian craters, the early Martian atmosphere is very thin, leading to the Martian surface and air temperature is low, not enough to hold liquid water.

???? after that, unlike the current Mars in cold and dry environment, the early Martian volcano eruption will cause a warm, moist environment, whereas the Martian surface water mark indicates that at least in the very early days there was a liquid water. But new evidence that Mars billions of years ago, the temperature is low, not enough to sustain liquid water to exist for a long time.

???? researchers America institutions such as Princeton University, based on the detailed analysis of the Mars more than 300 crater area, depth data USA Mars exploration data, and through the Cheap Netherlands Soccer Jerseys computer Cheap Brazil Soccer Jerseys model to evaluate these celestial bodies colliding with Mars, the projection of its size and enter the atmosphere of Mars speeds. Cheap Cameroon Soccer Jerseys This crater has a history of about 3600000000 years, because of the surface of Mars environment is relatively stable, the crater shape will not change.

???? researchers believe that, if the atmosphere is thick enough, or meteorite broke into the Martian atmosphere, a large part of its due to friction and the intense atmosphere Ashes To Ashes, as it is now small bodies fall into the earth atmosphere. But according to their simulation results, the Martian atmosphere although than now to thick, but it is only equivalent to sustain liquid water the Cheap Sweden Soccer Jerseys required thickness of the atmosphere by 1/3, far Cheap Poland Soccer Jerseys not enough to make the Martian surface and atmospheric temperature maintained at above the freezing point of water over a long period of time.

???? researchers say, this finding supports the early Mars very cold view. Although the volcano and other factors will result in the short term the Martian temperatures, but from a long-term point of view, the early Mars might not have previously imagined so warm and humid, most of the time to keep the liquid water on mars. (reporter Liu Shilei)