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Bardzo liczę na nowy, "ciężki" helikopter.
Po roku badań naukowych potwierdzono, że próbka skały pobrana przez łazik Perseverance zawiera potencjalną biosygnaturę. Próbka ta jest jak dotąd najlepszym kandydatem na dowód istnienia pradawnego życia mikrobiologicznego na Marsie.https://x.com/NASAMars/status/1965798444322459757
Wyścig po próbki trwa.
In higher-resolution images, the instruments found a distinct pattern of minerals arranged into reaction fronts (points of contact where chemical and physical reactions occur) the team called leopard spots. The spots carried the signature of two iron-rich minerals: vivianite (hydrated iron phosphate) and greigite (iron sulfide). Vivianite is frequently found on Earth in sediments, peat bogs, and around decaying organic matter. Similarly, certain forms of microbial life on Earth can produce greigite.The combination of these minerals, which appear to have formed by electron-transfer reactions between the sediment and organic matter, is a potential fingerprint for microbial life, which would use these reactions to produce energy for growth. The minerals also can be generated abiotically, or without the presence of life. Hence, there are ways to produce them without biological reactions, including sustained high temperatures, acidic conditions, and binding by organic compounds. However, the rocks at Bright Angel do not show evidence that they experienced high temperatures or acidic conditions, and it is unknown whether the organic compounds present would’ve been capable of catalyzing the reaction at low temperatures. The discovery was particularly surprising because it involves some of the youngest sedimentary rocks the mission has investigated. An earlier hypothesis assumed signs of ancient life would be confined to older rock formations. This finding suggests that Mars could have been habitable for a longer period or later in the planet’s history than previously thought, and that older rocks also might hold signs of life that are simply harder to detect.“Astrobiological claims, particularly those related to the potential discovery of past extraterrestrial life, require extraordinary evidence,” said Katie Stack Morgan, Perseverance’s project scientist at NASA’s Jet Propulsion Laboratory in Southern California. “Getting such a significant finding as a potential biosignature on Mars into a peer-reviewed publication is a crucial step in the scientific process because it ensures the rigor, validity, and significance of our results. And while abiotic explanations for what we see at Bright Angel are less likely given the paper’s findings, we cannot rule them out.”
Homer Hickam @realhomerhickam 7:00 PM · Sep 10, 2025This is as likely geologic as biologic. As an avid amateur paleontologist for over 25 years, I have seen again and again geologic processes that look like biologic in ancient river beds. Even if you had the actual sample, the results would be questionable as geologic precipitates can mimic biologic. Probably the only way this will ever be settled is to tap into deep water wells on Mars and see what's there. https://sciencenews.org/article/fake-fossil-biomorphs-more-common-ancient-rocks-real-fossils
Wątek: Mars Rover 2020 Perseverance (Przeczytany 546771 razy)