Chinese scientists published four Nature studies using 1,935.3g lunar samples. Key findings: Volcanic activity ~4.2/2.8 billion years ago with magnetic fluctuations, significantly drier mantle than near side, and impact-sourced basalts. The research resolves the 2,500-km basin's evolution and lunar asymmetry, cementing China’s planetary science leadership.（Photo/Chinese Academy of Sciences）

By FuRui, Sun Jiamin(intern), Li Si and Qiu Chenhui/China Youth Daily

来源：中国青年报客户端