Articles with the keyword: 
Water's role in Martian chemistry becoming clearer
sea-maid submitted, created time 3 months 5 days (www.sciencenews.org)
As its mission nears its end, the NASA Phoenix Mars Lander finds strong evidence for minerals similar to those formed on Earth by liquid water. 
Phoenix lander tastes its first ice
sea-maid submitted, created time 5 months 4 days (www.nature.com)
After a month of difficulty, the Mars Phoenix spacecraft is back in the baked goods business — and even got to put a little icing on top.
On Thursday, mission scientists announced they had managed to scrape some Martian soil up and sprinkle it inside one of the spacecraft’s eight ovens — where they discovered that a tiny bit of ice had tagged along with the soil. It’s the first ice actually sampled by the mission after weeks of fruitless attempts to get more pure ice in the ovens.
A panorama of the Phoenix landing site reveals its dusty environs (NASA/JPL-Caltech/U. Arizona/Texas A&M)
sea-maid submitted, created time 6 months 3 days (sciencenow.sciencemag.org)
Martian soil data collected by five robotic missions indicates that rain fell on the Red Planet billions of years ago. The findings provide no new insight into the possibility of martian life, but they do suggest that further clues to Mars's past could be found right here on Earth.
sea-maid submitted, created time 6 months 6 days (sciencenow.sciencemag.org)
The first chemical lab results beamed back from the Phoenix lander in the deathly cold martian arctic show that life could get along just fine there, given a bit of liquid water. But there's still no evidence that organisms could have populated the area in the past.
Extreme Life in the Martian Arctic?
sea-maid submitted, created time 6 months 2 weeks (www.time.com)
Bizarre microbes flourish in the most punishing environments on Earth from the bone-dry Atacama Desert in Chile to the boiling hot springs of Yellowstone National Park to the sunless sea bottom vents in the Pacific. Could such exotic life emerge in the frigid arctic plains of Mars?
jerry submitted, created time 6 months 2 weeks (sciencenow.sciencemag.org)
NASA's "follow the water" approach to finding life--or evidence of past life--on Mars has finally hit pay dirt. Three weeks into its 90-day mission, the Phoenix lander has scraped a few centimeters down to an irrefutable layer of water ice in the martian arctic. The first robotic contact with water on Mars promises a score of chemical analyses in the next few months that could reveal whether this ice ever melted to liquid water that could have supported living organisms. And the discovery has already revealed some new mysteries beyond the question of life.
Phoenix team struggling to collect Martian soil
sea-maid submitted, created time 6 months 3 weeks (space.newscientist.com)
After running into trouble collecting samples of Martian soil, the Pheonix lander will try to use its robotic arm on Tuesday to sprinkle small amounts of soil on the lander's science instruments.
Darkfrog submitted, created time 7 months 1 week (sciencenow.sciencemag.org)
This article actually ties microbiology together with space travel rather neatly.
The Mars Phoenix lander was shipped off to the icy polar regions for one primary purpose (though I'm sure the NASA guys can come up with more now that it's there): search for liquid water and, importantly, microbial ilfe on Mars. That last possibility is looking less and less likely. Mars is showing high levels of salt, too high for known microbial life. Estimates put Mars' water at ten to a hundred times saltier than Earth's oceans. NASA has not given up hope yet
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