Gothenburg University scientists the latest research results show that the presence of liquid water on Mars surface in recent history can be traced back to 200,000 years ago. Scientists recently published research on top ” International Journal of Solar System .”
This figure shows the upper and lower left part of the surface of Mars topography mudslides . The geomorphic features and mudslides Mars topography ( lower right part ) on the planet Svalbard is very similar .
Beijing April 29 , according to foreign media reports, scientists at the University of Gothenburg, Sweden latest research results show that the presence of liquid water on Mars surface in recent history can be traced back to 200,000 years ago. Scientists recently published research on top ” International Journal of Solar System .”
Scientists at the University of Gothenburg, Sweden, the study found that in the southern hemisphere of Mars in the presence of a young well-preserved craters and valleys formed by sediment may flow . Mars at the end of the last ice age about 400,000 years ago , and this time the crater formed much later after this time . According to the scientists speculate that the history of this crater is not more than 20 years. Thus , the scientists concluded that these landscape features formed by the flow of liquid water also began to form after that time .
The person in charge of the study , scientists at the University of Gothenburg, Sweden Andreas – Dr. Johnson said, ” valley surface of Mars is relatively common , but had studied the history of the valley are relatively long, and the regional sedimentary layers that formed , are also closely linked with the recent ice age . this time we studied the crater was too young , so it has not been affected by the recent ice age geography and climate. this suggests that the formation of these sediments meltwater takes place in the era of updates . ”
Artistic vision chart: Mars may exist situations lake.
This crater has the obvious characteristics of the earth landslides , sand and other substances that carry liquid fast flowing , then deposited. Scientists will Martian terrain features and mudslides on the Norwegian Svalbard archipelago in the Arctic Ocean were compared . Dr. Johnson explains, ” the results of our fieldwork on Svalbard confirms our interpretation of sediments on Mars To our surprise, mudslides formed crater topography even so young .”
According to scientists, this crater is located in the southern hemisphere mid-latitudes of Mars , and near a large crater ejecta barrier type superimposed . The so-called barrier -type ejecta pattern is considered wet or meteorite impact landforms icy ground formed . Scientists initially thought that these latest water landform type is stored in the ejecta of the barriers formed by ice . However, they did not find cracks in the melting ice can make gush . Dr. Johnson explains, ” The water is more likely to come from melting snow , possible reason is the history of Mars’ orbit axis tilt is much more than that now have to .”
Found evidence of the presence of water on Mars , going back to “Mariner 9 ” exploration mission . ” Mariner 9 ” probe detected the presence of traces of water erosion and river valleys on Mars . Today, Mars is in a mid- ice age , so liquid water can not exist in the current Martian surface. Then , the history of Mars seems to be warmer and more humid . In June last year , ” curiosity ” was found strong evidence of the presence of liquid water on Mars ; into September , ” curious ” No. A soil analysis showed that the Martian surface material containing 2 % moisture .