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Life on Mars!

Nasa rover discovers gas that suggests alien life

Independent.co.uk
Nasa's Curiosity rover has discovered high amounts of methane gas on the surface of Mars that suggests the possibility of alien life on the planet.
The discovery of the gas is significant because on Earth methane is usually produced by living things.
Any methane detected now must have been released recently as sunlight and chemical reactions would break up the molecules within a few centuries.
The data from the Curiosity rover arrived back on Earth on Thursday, and by Friday, scientists working on the mission were excitedly discussing the news.
"Given this surprising result, we've reorganised
Life on Mars!
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the weekend to ran a follow-up experiment," Ashwin Vasavada, the project scientist for the mission, wrote to the science team in an email that was obtained by The New York 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 were expected back on the ground yesterday.
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 around four 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.
On Earth, microbes known as methanogens thrive in places lacking oxygen, such as rocks deep underground and the digestive tracts of animals, and they release methane as a waste product. However, geothermal reactions devoid of biology can also generate methane.
It is also possible that the methane is ancient, trapped inside Mars for millions of years but escaping intermittently through cracks.
Nasa announced the methane
detection in a statement on Saturday but called it an "early science result."
A Nasa spokesperson added: “To maintain scientific integrity, the project science team will continue to analyse the data before confirming results."
Scientists first reported detections of methane on Mars a decade and a half ago using measurements from Mars Express, an orbiting spacecraft built by the European Space Agency and still in operation, as well as from telescopes on Earth.