Bacteria can survive on Earth or on Mars

September 26, 2013, the Mars rover Curiosity found the Martian soil is rich in water, about 1.5 to 3 weight percent, scientists thus have more expectations for the existence of life on Mars.

Bacteria can survive on Earth or on Mars

Scientists have been no interruption exploration of life on Mars. Mars and the Earth’s climate very different geography, Mars above the extremely dry and cold, are basically desert planet, surface sand dunes, gravel throughout; less than 1% of the Earth’s atmosphere, the equivalent of the Earth’s surface, counting 35 km high pressure The main ingredient is carbon dioxide and relatively thin; below the average temperature of carbon dioxide freezing point. Before scientists have confirmed the existence of large amounts of water ice under the surface of Mars, September 26, 2013, the Mars rover Curiosity found the Martian soil is rich in water, about 1.5 to 3 weight percent, scientists and thus the existence of life on Mars has more many expectations.

Microbiology and cytology from the University of Florida College of two American microbiologist Wayne? Nicholson and Andrew? Shu Geer conducted a test, they simulate the harsh environmental conditions on Mars to confirm whether the microorganisms can survive under these conditions. The river bank to collect their tired horses from Russia Siberia Section 12 to 20 meters deep sand mine bacteria, where the annual average temperature of minus 7 degrees Celsius. These bacteria then placed under normal culture conditions 28 degrees Celsius, and then separately with a variety of extreme conditions on Mars (such as hypoxia, extreme low temperature and low pressure) test their vitality. Typically, hypoxia, low temperature, low pressure will stop the growth of most microorganisms. 30 days after the end of the test, the test samples in 10,000 6 Fresh genus (carnobacterium) in such colonies grow survive harsh environments. And surprising is that in such a low atmospheric pressure and no oxygen conditions, the bacteria actually grow quite well. Scientists have also been in many cold regions (such as Alaska and Antarctica Ace Lake anoxic waters) genus of bacteria found in meat. ? Andrew Shu Geer said: at low pressure conditions, bacteria body should be able to start some kind of mechanism to help them adapt to the new environment. The experimental results are very important and can be used to assess whether there is life on Mars.

Since NASA’s “Curiosity” rover landing on Mars since it Gale Crater near Mars performed a number of successful exploration activities, some scientists have expressed concern: “Curiosity” rover will carry the Earth bacterial contamination Mars. Since the “curious” was found in the water on Mars, it is likely to activate it carries Earth bacteria. Although the “curious” was landed in Gaelic purpose is to probe the Martian crater geological structure, where the possibility of the presence of water is unlikely, but can not rule out perhaps one day find microbes on Mars from Earth. 2016 ESA plans to launch the first Mars rover –ExoMars, it can dig two meters deep to find life on Mars or even organic, scientists may be able to be confirmed expectations.

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