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Martian Microbes Could Be Eating Carbon Monoxide From the Atmosphere

Posted in Science on 24th Mar, 2015 08:30 AM by AlexMuller

If you've heard of carbon monoxide, a simple two-atom gas, it's probably from warning about how you should have a detector in your house because it's fatal to humans. So how can a microorganism get its energy from this stuff?

We already know of organisms on Earth that can get energy from gas via a process called oxidation. In simple terms, it means reattaching an oxygen atom to the gas, which transforms it back into carbon dioxide. In doing so, the reaction releases a burst of energy. Scientists already know of several compounds in the Martian soil that the plucky hypothetical microbes could use to oxidize their carbon monoxide, such as the molecule perchlorate.
Sadly, we have no current way to test whether this is right. Neither the Curiosity nor the Opportunity rover is equipped with the tools to detect life. They're also not near the areas where such life could exist, and can't travel there. (Our current best guess is a Martian feature called the recurring slope lineae, a seasonally ebbing swath of land identified in 2011 by the Mars Reconnaissance Orbiter.)
But NASA is currently evaluating a proposed mission called Icebreaker Life that would be sent in 2021 and would be able to detect microorganisms. McKay and King agree that this new research provides all the more reason to go forward with such a mission.
"Mars is a planet that's really no longer just a part of our imagination. This is something that's at our fingertips," says King.

Tags: MarsspaceplanetlifebiologychemistryNASA

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Author: Guest
Posted: 2015-03-25
As explorations on mars intensify, it is clear that many exiting observations are coming. However, it is also clear that it will take quite some time before we are confident about some key questions, in particular about life on mars Reply


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