{"id":394940,"date":"2022-01-16T17:50:01","date_gmt":"2022-01-16T14:50:01","guid":{"rendered":"https:\/\/en.buradabiliyorum.com\/study-nixes-mars-life-in-meteorite-found-in-antarctica\/"},"modified":"2022-01-16T17:50:01","modified_gmt":"2022-01-16T14:50:01","slug":"study-nixes-mars-life-in-meteorite-found-in-antarctica","status":"publish","type":"post","link":"https:\/\/buradabiliyorum.com\/en\/study-nixes-mars-life-in-meteorite-found-in-antarctica\/","title":{"rendered":"#Study nixes Mars life in meteorite found in Antarctica"},"content":{"rendered":"

“#Study nixes Mars life in meteorite found in Antarctica<\/strong>”<\/p>\n

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\n The meteorite labeled ALH84001 is held in the hand of a scientist at a Johnson Space Center lab in Houston, Aug. 7, 1996. Scientists say they’ve confirmed the meteorite from Mars contains no evidence of ancient Martian life. The rock caused a splash 25 years ago when a NASA-led team announced that its organic compounds may have been left by living creatures, however primitive. Researchers chipped away at that theory over the decades. A team of scientists led by Andrew Steele of the Carnegie Institution published their findings Thursday, Jan. 13, 2022. Credit: AP Photo\/David J. Phillip
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A 4 billion-year-old meteorite from Mars that caused a splash here on Earth decades ago contains no evidence of ancient, primitive Martian life after all, scientists reported Thursday.<\/p>\n

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In 1996, a NASA-led team announced that organic compounds in the rock app<\/a>eared to have been left by living creatures. Other scientists were skeptical and researchers chipped away at that premise over the decades, most recently by a team led by the Carnegie Institution for Science<\/a>’s Andrew Steele.<\/p>\n

Tiny samples from the meteorite show the carbon-rich compounds are actually the result of water\u2014most likely salty, or briny, water\u2014flowing over the rock for a prolonged period, Steele said. The findings appear in the journal Science<\/i>.<\/p>\n

During Mars’ wet and early past, at least two impacts occurred near the rock, heating the planet’s surrounding surface, before a third impact bounced it off the red planet and into space millions of years ago. The 4-pound (2-kilogram) rock was found in Antarctica in 1984.<\/p>\n

Groundwater moving through the cracks in the rock, while it was still on Mars, formed the tiny globs of carbon that are present, according to the researchers. The same thing can happen on Earth and could help explain the presence of methane in Mars’ atmosphere, they said.<\/p>\n

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\n The meteorite labeled ALH84001 sits in a chamber at a Johnson Space Center lab in Houston, Aug. 7, 1996. Scientists say they’ve confirmed the meteorite from Mars contains no evidence of ancient Martian life. The rock caused a splash 25 years ago when a NASA-led team announced that its organic compounds may have been left by living creatures, however primitive. Researchers chipped away at that theory over the decades. A team of scientists led by Andrew Steele of the Carnegie Institution published their findings Thursday, Jan. 13, 2022. Credit: AP Photo\/David J. Phillip
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But two scientists who took part in the original study took issue with these latest findings, calling them “disappointing.” In a shared email, they said they stand by their 1996 observations.<\/p>\n

“While the data presented incrementally adds to our knowledge of (the meteorite), the interpretation is hardly novel, nor is it supported by the research,” wrote Kathie Thomas-Keprta and Simon Clemett, astromaterial researchers at NASA’s Johnson Space Center in Houston.<\/p>\n

“Unsupported speculation does nothing to resolve the conundrum surrounding the origin of organic matter” in the meteorite, they added.<\/p>\n

According to Steele, advances in technology<\/a> made his team’s new findings possible.<\/p>\n

He commended the measurements by the original researchers and noted that their life-claiming hypothesis “was a reasonable interpretation” at the time. He said he and his team\u2014which includes NASA, German and British scientists\u2014took care to present their results “for what they are, which is a very exciting discovery about Mars and not a study to disprove” the original premise.<\/p>\n