[meteorite-list] Earth & Mars - Share Microbes On Meteorites - Or Interestingly Different For Life?

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Earth & Mars - Share Microbes On Meteorites - Or Interestingly Different For Life?

By Robert Walker | September 24th 2013 11:35 AM 

Robert Zubrin says that there are no contamination issues involved in colonizing Mars, because microbes get transferred between the planets all the time on meteorites. His ideas get a lot of publicity, and so did a paper earlier this year "The overprotection of Mars". However there is another possibility, that life on Mars might be interestingly different from Earth life.
So, how easy is it for a microbe to travel on a meteorite from Earth to Mars or in the other direction? Is this something that happens often, and can many species do this? Or is this something rare and unusual, that perhaps never happened at all? 
Much of this derives from the American National Research Council (NRC) study in 2009 which came to the opposite conclusion to Zubrin and this recent paper. 
Tons of meteorites from Mars 
We do receive many meteorites from Mars. You can tell by the small samples of Martian atmosphere trapped in the rocks, which ........
 
to read more click here http://www.science20.com/robert_inventor/blog/earth_mars_share_microbes_meteorites_or_interestingly_different_life-121053 or delete.