Core Viewpoint - Chinese scientists have optimized a decades-old lunar impact history model using samples from the far side of the Moon, confirming that the impact flux on both the near and far sides is consistent and that early impact flux shows a smooth decline, contradicting the "late heavy bombardment" hypothesis [1][6]. Group 1: Research Findings - The study published in "Science Advances" indicates that the lunar impact flux is uniform across both sides of the Moon, challenging previous assumptions about differential impact rates [1][6]. - The analysis of samples from the Chang'e 6 mission revealed two significant breakthroughs: a young basalt dated at approximately 2.807 billion years and an ancient rock at 4.25 billion years, providing a more comprehensive timeline for lunar evolution [3][6]. - The new model developed from the Chang'e 6 data refutes two major hypotheses regarding early lunar impacts, suggesting that the impact activity was a smooth decline rather than a chaotic period of heavy bombardment [6]. Group 2: Methodology and Implications - The research utilized lunar samples and remote sensing images to establish a reliable dating model, linking sample ages to impact crater densities [3][6]. - Prior to the Chang'e 6 mission, all lunar dating samples had significant limitations, primarily being sourced from the near side and lacking samples older than 4 billion years, which restricted understanding of the Moon's earliest history [4][6]. - The findings provide a more accurate "time scale" for lunar scientific research, establishing a global impact crater chronology model that enhances the understanding of the Moon's geological history [6].