Did Mars once host life?
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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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Photographs sent by a NASA orbiter suggests that water may indeed be flowing on Mars. And where there's water, there's at least a chance of life. By the Associated Press.
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Global warming and not a giant asteroid may have nearly wiped out life on Earth some 250 million years ago, an international team of scientists said on Thursday.
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Water vapour and methane gas have been found in the same places on Mars, strengthening speculation that the Red Planet could be a haven for microbial life, space scientists say.
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LOS ANGELES -- After decades of scouring images of Mars for signs of water, scientists believe they have found stunning evidence that water may even now be flowing through the Red Planet's frigid surface.The news excited scientists who hunt for extraterrestrial life.
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DENVER, COLORADO -- Those twin robots hard at work on Mars have transmitted teasing views that reinforce the prospect that microbial life may exist on the red planet.
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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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Ancient carbon-rich globules could offer a glimpse into the solar system's planet-building past and may provide clues to how life on Earth first arose.
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New methane readings from a space probe raise the possibility that microbial life could exist on Mars. Some scientists, though, remain skeptical.
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Astronomers suspect the early Earth was a very harsh place. Temperatures were extreme, and the planet was constantly bombarded by cosmic debris. Many scientists believe that life's starting materials, or building blocks, must have been very resilient to have survived this tumultuous environment.
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Concentrations of water vapor and methane gas in certain regions of the red planet strengthen speculation that Mars could be a haven for microbial life.
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Rocky planets with conditions suitable for life may be more common than previously thought, a study finds
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The idea that there may be life on Mars has been around for centuries, but the theory got a dubious boost from recently released photos of the surface of Mars (taken by the NASA robot Spirit) apparently showing a human-like figure. Several Internet sites have glommed onto the image and suggested the figure could be alive.
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A controversial new study suggests Mars had an acidic ocean. The strange brew spiked with sulfates and iron could still have harbored life, scientists say.
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Washington - The conclusive discovery by a pair of wheeled robots that Mars once had vast pools of water and possibly 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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JACKSON HOLE, Wyoming -- There is mounting evidence of the role of water  in Mars' evolution. That fact appears to have been favorable to the  development of life -- and the leftover calling card of past biology may be  preserved in that world's geologic record.
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LIVELY MARS : ET might just be out there. NASA&#39;s two Mars rovers, Opportunity and Spirit, landed on the Red Planet early in 2004 and have since found conclusive evidence of water that could possibly have harboured life.