Articles with the keyword: 
Mystery stone circles may point to water on Mars
sea-maid submitted, created time 5 days 8 hours (www.newscientist.com)
Using cameras on NASA's Mars Reconnaissance Orbiter, Matt Balme of the Open University in Milton Keynes, UK, and his colleagues mapped the Elysium Planitia, a region near the equator. They saw rings up to twenty-three meters across made up of stones sorted by size into concentric bands. 
Microbes drove Earth's mineral evolution
sea-maid submitted, created time 1 month 3 weeks (www.nature.com)
A comprehensive history of Earth's mineral wealth concludes that without life, many raw materials wouldn't exist. In the early interstellar medium, scientists say, there were about twelve minerals. The planetary formation process upped this to around sixty. The addition of water (itself a mineral) allows for more different kinds of reactions and the mineral count jumps into the hundreds
Water's role in Martian chemistry becoming clearer
sea-maid submitted, created time 3 months 6 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.
Mars iron is ideal for building future bases
sea-maid submitted, created time 3 months 1 week (space.newscientist.com)
FUTURE colonizers of Mars needn't worry about lugging materials from Earth to build their bases - the most widely used building material on Earth, steel, could be manufactured on the Red Planet.
The rover Opportunity has found elemental iron - a key ingredient of steel - peppered across the Martian surface as a result of collisions with iron-rich meteorites. The dry conditions and lack of atmospheric oxygen mean that the stuff has not rusted, says Geoffrey Landis of NASA's Glenn Research Center in Cleveland, Ohio
sea-maid submitted, created time 4 months 1 week (www.nature.com)
It's now or never for the Opportunity. The Mars rover Opportunity is set to climb out of the Victoria crater a bit ahead of schedule. The original plan had been to allow the rover more time to examine the layers of the Martian crust exposed in the crater's sides, but its operators noticed a spike in the current similar to the one that preceded severe problems with its sister rover, Spirit. If the Opportunity were to lose one of its six wheels now, say scientists, it would make it nearly impossible for it to climb out of the crater and visit other parts of the Martian surface.
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 4 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 1 week (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.
sea-maid submitted, created time 6 months 1 week (www.nature.com)
Should we be looking for penguins on Mars, rather than little green men? Just a week after finding definitive signs of water ice just beneath the surface, news of another remarkable scientific discovery has been beamed back to Earth by the Mars lander Phoenix.
The scientist found traces of magnesium, sodium, potassium and chloride ions – constituents of salts. The pH of the soil taken from an inch under the surface is high – 8 or 9 — making the soil quite basic. “The alkalinity of the soil at this location is definitely striking,” says Kounaves.
Mars soil capable of sustaining plant life
sea-maid submitted, created time 6 months 1 week (www.latimes.com)
Surprisingly alkaline, the soil on Mars it could support green beans and asparagus, say Phoenix mission scientists, who are "flabbergasted" by the findings.
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.
Has Mars lost the fire? Northern ice cap suggests little geothermal activity.
Darkfrog submitted, created time 7 months 4 days (www.sciencemag.org)
I remember learning long ago that Mars once had an atmosphere belched up by its many volcanoes, but that its gravity had been insufficient to keep it from drifting off into space. Once the volcanoes slowed and stopped, the atmosphere began to deplete. New data suggest that Mars today shows little geothermal activity.
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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amino acid : Fmoc-D-Val-OH
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dGTP (100mM) >98% HPLC
2?-deoxyguanosine-5?-triphosphate;[[[5-[(2-amino-6-oxo-1,9-d ...
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pRNA-H1.1/Retro
siRNA Vector : pRNA-H1.1/Retro
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Disulfide Oxidoreductase (native)
DsbA produced in E. coli is a periplasmic protein isolated f ...
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