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Nasa probes oxygen mystery on Mars

Curiosity has been exploring Gale Crater, which once hosted a body of liquid water
The oxygen in Martian air is changing in a way that can't currently be explained by known chemical processes.
That's the claim of scientists working on the Curiosity rover mission, who have been taking measurements of the gas.
They discovered that the amount of oxygen in Martian "air" rose by 30% in spring and summer.
The pattern remains a mystery, but researchers are beginning to narrow the possibilities.
While the changes are most likely to be geological in nature, planetary scientists can't completely rule out an explanation involving microbial life.
The results come from nearly six Earth years' (three Martian years') worth of data from the Sample Analysis at Mars (Sam) instrument, a portable chemistry lab in the belly of the Curiosity rover.
The scientists measured seasonal changes in gases that fill the air directly above the surface of Gale Crater on Mars, where Curiosity landed. They haveĀ published their findings in the journal JGR-Planets.
The Martian atmosphere is overwhelmingly composed of carbon dioxide (CO2), with smaller amounts of other gases such as molecular nitrogen (N2), argon (Ar), molecular oxygen (O2) and methane (CH4).

I wonder if there are certain Microbial life that have begun to display evolution or adaptation. and could we be the documenter of Mars's evolution.
What exactly is causing this pattern change? Can this be taken as a sign that humans could be living on another planet in the future?
The effects of the rise in the oxygen levels on Mars can be quite amazing. Water has already been found on mars and maybe the rise in oxygen will make it even more suitable for humans.
I believe that scientists will be able to understand sometime in the near future, regarding the changing air. Scientists will find the reasons. I do believe this is amazing to think about though. To think that oxygen levels rising in martian air, overall helps us in our future. that as it continues to rise, one day we may be able to populate another planet, like mars, which will greater our chances of life, as not everyone would only be on earth.

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