NASA Rover on Mars Detects Puff of Gas That Hints at Possibility of Life

The Curiosity mission's scientists picked up the signal this week, and are seeking additional readings from the red planet. From a report: Mars, it appears, is belching a large amount of a gas that could be a sign of microbes living on the planet today. [Editor's note: the link may be paywalled; alternative source.] In a measurement taken on last Wednesday, NASA's Curiosity rover discovered startlingly high amounts of methane in the Martian air, a gas that on Earth is usually produced by living things. The data arrived back on Earth on last Thursday, and by Friday in the week, scientists working on the mission were excitedly discussing the news, which has not yet been announced by NASA. 'Given this surprising result, we've reorganized the weekend to run a follow-up experiment,' Ashwin R. Vasavada, the project scientist for the mission, wrote to the science team in an email that was obtained by The Times.

The mission's controllers on Earth sent new instructions to the rover on Friday to follow up on the readings, bumping previously planned science work. The results of these observations are expected back on the ground later today. People have long been fascinated by the possibility of aliens on Mars. But NASA's Viking landers in the 1970s photographed a desolate landscape. Two decades later, planetary scientists thought Mars might have been warmer, wetter and more habitable in its youth some 4 billion years ago. Now, they are entertaining the notion that if life ever did arise on Mars, its microbial descendants could have migrated underground and persisted.

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