Mars water tops science honours
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The discovery that salty, acidic water once flowed across the surface of Mars has topped a list of the 10 key scientific advances of 2004.
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Astronomers have found what they say is the best evidence yet for water, or at least steam, in the atmosphere of a planet around another star.
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The Mars rover Spirit found a mineral linked to water during its exploration of the Red Planet, NASA's Jet Propulsion Laboratory said Monday.
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US scientists have found new data showing patterns of water and methane on Mars could improve the chances life once existed there.
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By Alicia Chang THE ASSOCIATED PRESS  For decades, scientists have scoured Mars in search of water, a basic ingredient for primitive life.  But the best clues were always tied to the ancient past when the Red Planet was warmer and wetter.
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Image: This map shows the estimated lower limit of the water content of the upper meter of Martian soil. &quot;Odyssey has accomplished all of its mission-success criteria,&quot; said Dr.
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Paris - The European Space Agency (ESA) said on Monday that it had found concentrations of water vapour and the gas methane in the same places on Mars, a finding which strengthens speculation that the Red Planet could be a haven for microbial life.
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By JOHN JOHNSON JR.  NASA scientists announced Wednesday that they had found evidence that water still flows over the surface of Mars - sporadic gushers that increase the possibility that the Red Planet could harbor some form of life.
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Pictures of Martian gullies taken years apart suggest that liquid water still flows on the planetÂs surface.
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Stunning color images offer new evidence that plentiful water once percolated through Martian bedrock&#8212;and new hints as to where life might be hiding.
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WASHINGTON - The discovery by a pair of wheeled robots that Mars once had vast pools of water and could have harboured life was chosen by the editors of the journal Science as the most important scientific achievement of 2004.
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Methane and water vapour are concentrated in the same regions of the Martian atmosphere, say scientists studying data from Europe&#39;s Mars Express orbiter.
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NASA's Mars Reconnaissance Orbiter spacecraft this month is set to surpass the record for the most science data returned by any Mars spacecraft.
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Nasa says it has found "compelling" evidence that water flowed recently on the Martian surface.
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The Mars Reconaissance Orbiter sends back images supporting theories that water once existed  -  or could still exist  -  on the red planet
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PASADENA, Calif. - A patch of Martian soil analyzed by NASA's rover Spirit is so rich in silica that it may provide some of the strongest evidence yet that ancient Mars was much wetter than it is now.
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The Mars rovers have found fresh evidence that water was plentiful in both the hills and plains of the now-barren Red Planet, scientists at NASA Jet Propulsion Laboratory said on Thursday.