涉及25个实验项目 重约37.25公斤 空间站第八批实验样品返回

Core Points - The eighth batch of space science experiment samples has successfully returned to Earth with the Shenzhou 19 crew, involving 25 experimental projects across various fields [1][3] - The total weight of the returned samples is approximately 37.25 kilograms [3] Group 1: Life Science Experiments - The delivered samples primarily consist of life science experiments, including bone cells, bronchial epithelial cells, early embryos of humans and animals, protein samples, and fruit flies, totaling 20 categories [6][8] - These life science samples were prioritized for transport due to their biological activity requirements, marking the largest variety of biological samples returned from the space station [6] Group 2: Fruit Fly Experiments - A notable experiment involved fruit flies that successfully bred in space, achieving "four generations" under microgravity and low magnetic field conditions [11][15] - Fruit flies are significant model organisms in genetic research, with 75% of human disease genes having homologs in fruit flies, contributing to six Nobel Prizes in related studies [13] Group 3: Material Science Experiments - The materials science samples, including high-strength steel and lunar soil reinforcement materials, will be transported back to Beijing for further research [19] - The ongoing research aims to provide important theoretical foundations and technical support for future deep space exploration and human space activities [19]