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August 2, 2005
Methane On Mars - The Plot Thickens
Topics: General Science
Methane on Mars may be produced at rates 3000 times higher than previously thought and partially destroyed by dust storms, controversial new research suggests.
The work is sure to reignite the debate over a possible biological origin for the gas, but another team reports that subsurface volcanism alone - and not life - can account for the gas.
Sunlight is thought to destroy methane molecules in Mars's atmosphere over about 300 years. So recent discoveries of the gas by space- and ground-based instruments suggested it is actively being replenished by geological processes or - possibly - living microbes.
The mystery deepened when some researchers claimed to find methane concentrated in certain locations on Mars. That is a puzzle because atmospheric currents are expected to spread the gas evenly around the planet in a matter of weeks or months.
Posted by Hyscience at August 2, 2005 9:08 PM
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