Mars: NASA's Curiosity rover finds new organic matter in Gale Crater

NASA's Curiosity rover discovers fresh organic compounds in Martian crater, fueling the search for ancient life. | Contesto: cronaca

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• Mars: NASA's Curiosity rover finds new organic matter in Gale Crater

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NASA's Curiosity rover has identified a new cache of organic compounds within the rocks of Mars's Gale Crater, the agency announced this week. The discovery, made as the robotic explorer continues its decade-long traverse of the crater's slopes, represents the latest and most diverse set of carbon-based molecules found in the ancient, sediment-filled basin. While not direct evidence of life, these organics are crucial chemical building blocks, and their presence in a location believed to have once held a long-standing lake intensifies the scientific intrigue surrounding the Red Planet's past potential for habitability. The findings come from an analysis of powdered rock samples drilled from a formation known as the "Bishop's Peak," within the crater's vast central mound, Mount Sharp. Using the rover's onboard Sample Analysis at Mars (SAM) instrument suite, scientists detected a variety of organic molecules, including some that had not been previously observed in such abundance at this location. The specific types of molecules, including thiophenes and other aromatic compounds, are often associated with geological processes but can also be produced by biological activity, presenting a compelling puzzle for researchers to unravel. Gale Crater, a 96-mile-wide impact basin, was selected as Curiosity's landing site precisely because its geological history suggests it was once filled with water. Orbital imagery had long indicated layered sediments characteristic of a lakebed, a hypothesis the rover's ground-truth observations have consistently confirmed. "We are essentially driving through the pages of Martian history," said one project scientist, who noted that each layer of Mount Sharp represents a different era in the crater's climatic past. The new organics were found in a layer corresponding to a time when the lake environment may have been becoming more saline, a condition that can help preserve organic material over billions of years. The significance of the discovery lies not in a single "smoking gun" for life, but in the accumulating pattern of evidence. This is not the first time Curiosity has found organics in Gale Crater; a landmark detection in 2018...

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Categoria: cronaca