Mystery methane on Mars: The saga continues

Friday, May 15, 2015 - 07:30 in Astronomy & Space

Is the Red Planet giving off methane? The question has taunted scientists for nearly 50 years, ever since the Mariner 7 spacecraft detected a whiff of the gas near Mars' south pole. Researchers retracted the finding a month later after realizing that the signal was in fact coming from carbon dioxide ice.

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