What Role Has Methane Played in the Search for Life

question 11

Multiple Choice

What role has methane played in the search for life on Mars?

• A) Methane destroys simple life-forms, so the existence of methane precludes the existence of simple life-forms on Mars.
• B) Methane is produced by life-forms, so the search for methane being released from under the Martian surface-so far unsuccessful-continues.
• C) Sunlight breaks down methane within a few centuries. The presence of methane on Mars suggests that it is being renewed continually, perhaps by living organisms.
• D) So far methane has played no role in the search for life on Mars.

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