BUSINESS LINE - Mars missing most of its atmosphere: NASA, Apr 9, 2013

 "WASHINGTON, APRIL 9:   Mars may have lost much of its original atmosphere, but the remaining atmosphere on the Red planet is still quite active, findings from NASA’s Curiosity rover indicate. Evidence has strengthened this that Mars lost much of its original atmosphere by a process of gas escaping from the top of the atmosphere, NASA’s Jet Propulsion Laboratory, California, said in a statement. Curiosity’s Sample Analysis at Mars (SAM) instrument analysed an atmosphere sample last week using a process that concentrates selected gases. The results provided the most precise measurements ever made of isotopes of argon in the Martian atmosphere. “We found arguably the clearest and most robust signature of atmospheric loss on Mars,” said Sushil Atreya, a SAM co-investigator at the University of Michigan, Ann Arbor."
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