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Mars Was Too Salty for Life

Rock analysis shows even microbes couldn't have survived in planet's early history

By Rob Quinn,  Newser Staff

Posted Feb 16, 2008 7:58 AM CST

(Newser) – Hopes that Mars may once have supported life have taken a blow with the discovery that the planet has been too salty for life for much of its history, the BBC reports. "It was salty enough that only a handful of known terrestrial organisms would have a ghost of a chance of surviving there when conditions were at their best," a member of NASA's Mars rover team said.

The Opportunity rover has been on Mars for months analyzing rocks. The results show that in Mars' watery early history, the environment was too salty and acidic for even the toughest micro-organisms. The search for Martians will continue when the Phoenix lander arrives near the planet's north pole in May to look under the frozen surface for evidence of life.

This image provided by NASA shows NASA's Mars Exploration Rover Spirit as it begins examine a group of angular rocks given informal names corresponding to peaks in the Colorado Rockies. Spirit used its front hazard-identification camera Oct. 10, 2007 to capture this wide-angle view of its robotic arm extended to...
This image provided by NASA shows NASA's Mars Exploration Rover Spirit as it begins examine a group of angular rocks given informal names corresponding to peaks in the Colorado Rockies. Spirit used its...   (Associated Press)
In this image provided by NASA a promontory nicknamed Cape Verde can be seen jutting out from the walls of Victoria Crater in this approximate true-color picture taken by the panoramic camera on NASA's Mars Exploration Rover Opportunity Oct. 20, 2007. The rover took this picture more than a month...
In this image provided by NASA a promontory nicknamed "Cape Verde" can be seen jutting out from the walls of Victoria Crater in this approximate true-color picture taken by the panoramic camera on NASA's...   (Associated Press)
This image provided by NASA shows an image capturing the westward view from atop a low plateau where NASA'S Mars Exploration Rover Spirit  spent the closing months of 2007. It was perched near the western edge of Home Plate when it used its panoramic camera to take the images used...
This image provided by NASA shows an image capturing the westward view from atop a low plateau where NASA'S Mars Exploration Rover Spirit spent the closing months of 2007. It was perched near the western...   (Associated Press)
NASA's Hubble Space Telescope took this picture of Mars in 2003. The possibility of a collision between Mars and an approaching asteroid has been effectively ruled out, according to scientists watching the space rock as it nears the Red Planet. (AP Photo/NASA, FILE)
NASA's Hubble Space Telescope took this picture of Mars in 2003. The possibility of a collision between Mars and an approaching asteroid has been effectively ruled out, according to scientists watching...   (Associated Press)
A  photo released by NASA ,shows  a patch of bright-toned soil found by the Mars Rover Spirit so rich in silica that scientists propose water must have been involved in concentrating it.   (AP Photo/HO/NASA)
A photo released by NASA ,shows a patch of bright-toned soil found by the Mars Rover Spirit so rich in silica that scientists propose water must have been involved in concentrating it. (AP Photo/HO/NASA)   (Associated Press)
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