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NASA: Mars methane eruption most likely from microbial decomposition

via:博客园     time:2016/1/11 15:00:20     readed:2145


Text / Hu Zhou (micro channel public number: knowledge society academic circle)

The findings on Mars may radically change our view. In the universe, we are not alone.

The curiosity Rover detected a methane gas eruption that lasted for at least two months. This may not we imagine the first extraterrestrial contact scenarios, nor in the dust has long distant world found the ruins, but this has let scientists excited extremely, because it means that there are only two possibilities.

The first possibility is that the methane production from the geological process of the role of the snake, which requires the support of heat and liquid water

Krasnopolsky Vladimir of the The Catholic University of America points out that the bacteria are the most likely source of methane in the past millions of years because Mars does not exist in volcanic activity. On the earth, 95 of the methane comes from microbes.

In the Martian atmosphere, methane molecules after several hundred years of light and chemical reactions will be decomposed, so the curiosity found that the methane gas must be produced in the near future. This suggests that if the source is a microorganism, they are at least in the short term.


American astronomer Carle

In November 2013, the curiosity Rover methane levels were 10 times higher than the previous data.

Until the end of 1, the methane content remained at a high level, and then dropped to below the 1ppb level. The rapid appearance and disappearance of this wave indicate that the methane is relatively small.

Chang wrote:


NASA curiosity detector insulation board, in the process of falling on the Martian surface

At that time, many scientists believe that this is likely to be a measurement error. Kuhn Thomas, a philosopher of science, once said that the scientific paradigm is always full of anomalies that are often regarded as false. It is only when we can not explain the phenomenon of enough for a long time, we can build up the so-called paradigm shift. Can this new result lead to a paradigm shift in the concept of life on Mars? At least, according to Grotzinger Dr., the eruption of methane has once again become a hot spot.


Above, the methane concentration map of Mars, measured by the curiosity rover, is a time span of the horizontal axis, the 750 Mars days between September 2014 and August 2012. It can be seen that the concentration of methane has increased significantly, the average value reached 7ppb, while the normal average level before and after the peak as mentioned, only 0.7ppb. The measurement task is accomplished by the Mars Sample Analysis Laboratory Suite (Suite SAM) in a tunable laser spectrometer (TLS).



According to the NASA report, the curiosity is also the first to confirm the presence of carbon based organic molecules in the Martian rock samples. These are not the direct signals of life, but there is evidence of an increase in the conditions of life on Mars, and may still exist. Curious, 350 million years ago in the formation of gale crater soil fine found combined with water and make sure there's about two pints of water in the Martian soil per cubic feet, but the water is depended on mineral, can not be in direct contact with.

Mars is not being the original concept of gally, with new discoveries and slowly changing. Now we already know that it is not as barren as we originally imagined, to be further, Mars is not as we imagined it would be no life at all?



Http://www.jpl.nasa.gov/spaceimages/details.php? Id=PIA19087?


10.1126/science.1261713 doi:

10.1126/science.1260291 doi:

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