Methane on Mars

In what could develop into one of the biggest science stories of this century (I think), NASA scientists have confirmed the presence on methane in the atmosphere of Mars. What’s interesting about the finding is that it occurred in a “belch” or single release of 21,000 tonnes in the last part of summer in 2003. Now methane is usually made by microbial life, so the presence of methane suggests life on Mars. The question is – did this methane release occur due to living microbes or is it due to a release of ancient methane due to a geological event? Expect to hear a lot more about this one.
More information at:http://news.yahoo.com/s/ap/20090115/ap_on_sc/sci_mars_methane;_ylt=At00TiJBtzXT3P.XkG4k.MCHgsgF