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What Stoker and Lemke have found, according to several attendees of the private meeting, is not direct proof of life on Mars, but methane signatures and other signs of possible biological activity remarkably similar to those recently discovered in caves here on Earth.
Stoker said that below Mars’ surface, bacteria may dwell beneath the surface, eating minerals derived from subsurface rocks that contain iron and sulfur.
By studying the very acidic Rio Tinto, scientists hope to characterize the potential for a "chemical bioreactor" in the subsurface – an underground microbial biosphere might well control the chemistry of the topside environment. These organisms live on chemical energy and they appear to do that without the presence of oxygen.
Making that discovery at Rio Tinto, Stoker said, would mean uncovering a new, previously uncharacterized metabolic strategy for living in the subsurface. "For that reason, the search for life in the Rio Tinto is a good analog for searching for life on Mars," she said.
"The Rio Tinto region of Spain features sulfide minerals on the surface of ponded water. Researchers see the site as offering clues in the search for life on Mars. CREDIT: Carol Stoker, NASA Ames Research Center"
www.space.com...
NASA on Friday issued an unusual denial of a report that its researchers found strong evidence for life's existence on present-day Mars.
NASA does not have any observational data from any current Mars missions that supports this claim. The work by the scientists mentioned in the reports cannot be used to directly infer anything about life on Mars, but may help formulate the strategy for how to search for martian life. Their research concerns extreme environments on Earth as analogs of possible environments on Mars. No research paper has been submitted by them to any scientific journal asserting martian life.
Originally posted by kenshiro2012
Hate to be the one to burst the bubble, but it looks like NASA has retracted the findings:
NASA on Friday issued an unusual denial of a report that its researchers found strong evidence for life's existence on present-day Mars.
Link to the news Space agency denies report about Red Planet life
From Nasa's WebSite:
NASA does not have any observational data from any current Mars missions that supports this claim. The work by the scientists mentioned in the reports cannot be used to directly infer anything about life on Mars, but may help formulate the strategy for how to search for martian life. Their research concerns extreme environments on Earth as analogs of possible environments on Mars. No research paper has been submitted by them to any scientific journal asserting martian life.
NASA Statement on False Claim of Evidence of Life on Mars