What do scientists believe is responsible for the methane on Mars?



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    There are theories about how martian methane was formed.  There has to be a continous process of methane being released into the atmosphere because Mars cannot support the gas, and while scientists do not know the cause for certain, it must be either biological or geological.  There is not an even veil of methane in the martian atmosphere, but rather, there are different circular areas (plumes) of the gas. 

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