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Life detection instrument passes key test on road to Mars

es through miniaturization and improvements at JPL over the next seven years in preparation for its long-range mission. In fact, she and Mathies hope she's the one looking at MOA data when it's finally radioed back from the Red Planet.

"When I first started this project, I had seen photos of the Martian surface and possible signs of water, but the existence of liquid water was speculative, and people thought I was crazy to be working on an experiment to detect life on Mars," Skelley said. "I feel vindicated now, thanks to the work of NASA and others that shows there used to be running liquid water on the surface of Mars."

"The connection between water and life has been made very strongly, and we think there is a good chance there is or was some life form on Mars," Mathies said. "Thanks to Alison's work, we're now in the right position at the right time to do the right experiment to find life on Mars."

Mathies said that his experiment is the only one proposed for ExoMars or the United States' own Mars mission - NASA's roving, robotic Mars Science Laboratory mission - that could unambiguously find signs of life. The experiment uses state-of-the-art capillary electrophoresis arrays, novel micro-valve systems and portable instrument designs pioneered in Mathies' lab to look for homochirality in amino acids. These microarrays with microfluidic channels are 100 to 1,000 times more sensitive for amino acid detection than the original life detection instrument flown on the Viking Landers in the 1970s.

The Atacama Desert was selected by NASA scientists as one of the key spots to test instruments destined for Mars, primarily because of its oxidizing, acidic soil, which is similar to the rusty red oxidized iron surface of Mars. Skelley and colleagues Pascale Ehrenfreund, professor of astrochemistry at Leiden University in The Netherlands, and JPL scientist Frank Grunthaner visited the desert last year, but were not able to test the complete, int
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Source:University of California - Berkeley


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