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Home»Tech News»NASA may have to dig deeper for evidence of life on Mars
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NASA may have to dig deeper for evidence of life on Mars

July 4, 2022Updated:July 4, 2022No Comments3 Mins Read
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NASA may have to dig deeper for evidence of life on Mars
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A crew of NASA scientists has advised that Mars rovers could must dig deeper than first thought to offer them one of the best likelihood of discovering proof of historic microbial life on the distant planet.

Current analysis carried out by the crew discovered that cosmic rays from the solar degrade small molecules resembling amino acids — the basic constructing blocks of life — at a a lot quicker charge than anticipated. The existence of sure amino acids are key in scientists’ quest to show that microbial life as soon as existed on Mars.

“Our outcomes counsel that amino acids are destroyed by cosmic rays within the martian floor rocks and regolith at a lot quicker charges than beforehand thought,” mentioned Alexander Pavlov of NASA’s Goddard Area Flight Heart in Greenbelt, Maryland. “Present Mars rover missions drill right down to about 2 inches (round 5 centimeters). At these depths, it might take solely 20 million years to destroy amino acids utterly.”

Since scientists are looking for proof of life on Mars from billions of years in the past when the planet was extra like Earth, the fabric collected from these shallow depths is probably not as helpful as first thought. Earth’s thick environment and international magnetic subject shields the planet from most cosmic rays, however Mars misplaced this safety billions of years in the past. In the course of the time when it did have a thicker environment, the crimson planet contained liquid water. “Since liquid water is important for all times, scientists need to know if life emerged on Mars and seek for proof of historic martian life by inspecting Mars rocks for natural molecules resembling amino acids,” NASA mentioned.

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The scientists’ findings counsel that martian rock samples should be extracted from a depth of about 6.6 toes (2 meters), the place any such proof ought to stay intact.

As NASA’s Perseverance rover can solely drill down a number of inches, the event might immediate the crew behind the present Mars mission to undertake a brand new technique for the rover, which has been gathering rock samples on the crimson planet for the final 10 months.

A workaround advised by the scientists includes extracting samples from uncovered outcrops resembling microcraters which are lower than 10 million years outdated, or from the fabric ejected by impacts involving these craters.

The house company additionally factors out that though amino acids have but to be discovered on Mars, they’ve been positioned inside meteorites, together with one from the crimson planet. “We did determine a number of straight-chain amino acids within the Antarctic Martian meteorite RBT 04262 within the Astrobiology Analytical Lab at Goddard that we consider originated on Mars (not contamination from terrestrial biology), though the mechanism of formation of those amino acids in RBT 04262 stays unclear,” mentioned NASA Goddard’s Danny Glavin, who was additionally concerned within the latest analysis. “Since meteorites from Mars sometimes get ejected from depths of at the least 3.3 toes (one meter) or extra, it’s potential that the amino acids in RBT 04262 had been shielded from cosmic radiation.”

NASA’s Jet Propulsion Laboratory, which is overseeing the present Mars mission, has but to answer the findings. Perseverance has already collected a variety of samples for later return to Earth in order that scientists can analyze the fabric in cutting-edge laboratories. Nevertheless, the crew could now redirect the rover to the form of areas cited within the scientists’ analysis.

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