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.
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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