Recent pictures taken by the rover Opportunity has revealed small ponds of liquid water on the surface of Mars. The report identifies specific spots that appear to have contained liquid water two years ago, when Opportunity was exploring a crater called Endurance.Many scientists are pessimistic however, because they believe that liquid water cannot exist on the surface of Mars because of its thin atmosphere. If these claims are true however, it would boost the odds that living organisms could survive on or near the surface of Mars, says physicist Ron Levin, who works in advanced image processing at the aerospace company in Lockheed Martin in Arizona.
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