Since all the sources were found during local [Mars] summer and disappeared
during winter, are the methane sources active only at certain periods
of the Martian year? Are they near the surface or buried deeper in the
soil? What mechanisms trigger the methane releases?
This impressive seasonal change in the distribution of methane raises
many new questions, but one thing is for sure: Mars is no longer
considered a dead planet. It has a very strong activity, whether
geologic or due to life – maybe both.
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