Cracks in Martian rock point to watery past
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LOS ANGELES - NASA&#39;s Mars rover, Opportunity, has found more signs that rocks on the Red Planet were once submerged in water. Data sent by Opportunity suggest a crater was drenched a second time after drying out, scientists said.
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Evidence from the Mars exploration rovers Spirit and Opportunity has led scientists to suggest that water was once present in large quantities 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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NASA's Opportunity rover has determined that a strange bubbly rock on the surface of Mars is actually a meteorite, offering a new clue into how the martian surface is made and remade.
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Nasa says it has found "compelling" evidence that water flowed recently on the Martian surface.
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A cracked rock called Escher is helping NASA scientists reconstruct the history of water on Mars. They say that the crater currently being explored by the Opportunity rover may have been shaped by a second
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Scientists controlling the Opportunity Mars rover are taking an up-close look at an intriguing pitted rock on Mars, now dubbed "Heat Shield Rock".
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One of the Mars rovers that have spent most of the past year studying the ruddy rocks and soil on the Red Planet is now taking a close look at some of the junk it shed during its fiery descent last January.
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By RANDOLPH E. SCHMID Associated Press  WASHINGTON -- An orbiting spacecraft has sent back new evidence for the presence of water on Mars.    Scientists long have debated whether water flowed on the red planet, with evidence increasing in recent years.
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Almost by accident, NASA&#39;s Mars rover Opportunity has found a rock that may point to a second water event in the red planet&#39;s past.
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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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New photographs from space suggest that water occasionally flows on the frigid surface of Mars, raising the tantalizing possibility that the Red Planet is hospitable to life, scientists reported Wednesday.
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NEW YORK With one Mars rover climbing into the hills and the other descending deep into a crater, scientists reported the discovery of several mysterious rock structures, along with yet more signs that Mars was once awash in water.
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A Mars-orbiting spacecraft has spotted a subterranean natural plumbing system that might have  ferried water beneath the surface of the red planet in the distant past.
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NASA says a false-color image taken by its Mars Exploration Rover Opportunity shows a rock dubbed &quot;Escher&quot; whose fractures, which divide the surface into polygons, may have been formed when water left over from the rock&#39;s formation dried up.
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After months of crossing a vast Martian crater floor and zigzagging up low-slung hills, NASA&#39;s Spirit rover has spotted its first hint that water once coursed across the now-desert-like region, scientists said Wednesday.
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NASA released images today that reveal water likely flowed through Martian gullies within the past few years, providing a "squirting gun" of liquid water's presence on the red planet.