美“毅力”号火星车发现远古生命存在的可能证据

Core Insights - NASA's Perseverance rover has collected a rock core sample from an ancient dried riverbed on Mars that may contain evidence of ancient microbial life [1][2] - The sample, named "Sapphire Canyon," was taken from sedimentary rock primarily composed of clay and silt, which are favorable for preserving traces of ancient life on Earth [1] - The discovery is significant as it suggests potential biological features, although further analysis is required to confirm any links to life [1][2] Summary by Sections - Sample Collection and Composition - The rock core sample "Sapphire Canyon" was collected from the Bright Angel Point formation, which was explored by the Perseverance rover in July of the previous year [1] - The sedimentary rock is rich in organic carbon, sulfur, iron oxide, and phosphorus, which may provide a rich energy source for microbial metabolism [2] - Scientific Significance - The findings represent a milestone in the search for life on Mars, being the closest discovery to confirming life on the planet to date [2] - The Perseverance rover's mission includes searching for signs of ancient life, exploring Mars' geological and climatic features, and paving the way for future human exploration [2]