在火星上寻找生命，有新发现

Core Viewpoint - A new study identifies the largest 16 ancient river basins on Mars as the most promising areas for searching for extraterrestrial life, suggesting that these regions may have once supported conditions favorable for life due to the presence of liquid water [1][2]. Group 1: Research Findings - The study reveals that Mars has 19 major valleys, streams, lakes, canyons, and sediment groups, with 16 of them forming interconnected basins covering at least 100,000 square kilometers each [1]. - These large river systems are believed to transport more nutrients, which could help sustain diverse ecosystems, similar to Earth's most fertile ecological systems [1]. - Although these large basins account for only about 5% of Mars' surface area, they contribute approximately 42% of the river-eroded sediments on the planet, making them key targets for finding evidence of past life [1].