Four Mice Carrying Key Experimental Data Return to Earth | China Space Station
Concluding a nearly two-week mission aboard China's space station, four mice have returned to Earth on November 14, 2025, with the three astronauts of China's Shenzhou-20 mission, bringing back highly valuable experimental data.
The return capsule of the Shenzhou-21 spaceship, carrying the Shenzhou-20 astronauts Chen Dong, Chen Zhongrui and Wang Jie, touched down at the Dongfeng landing site in north China's Inner Mongolia Autonomous Region on Friday.
Weighing 46.67 kilograms and collected from 26 experiment projects, these samples consist of nine from life experiments, three from combustion experiments, and 32 material samples.
Later, scientists will conduct biological analyses on the life experiment samples, carrying out multi-dimensional research on the impact of the microgravity environment on the body from cells to 3D tissues, and studying key relevant biological mechanisms and intervention targets, so as to provide new clues for the prevention and intervention of related diseases.
For the combustion experiment samples, researchers will study the generation characteristics of nano-carbon particles. The research results are expected to offer technical support for the development of new energy systems, space fire-prevention technologies, and the production of advanced functional nano-carbon materials.
For the material samples, researchers will carry out tests and analyses on their morphology and chemical composition to study the effect of gravity on material growth and component segregation. These studies will contribute to the future space application of high-performance solar cell protective materials and lunar base construction materials.
"China's in-orbit experiments have been carried out continuously over the long term. Currently, the space laboratory has entered a very normal and fully productive operating state. We hope through these experimental samples and subsequent ground-based research, we can further follow up and achieve more original scientific results with international influence," said Zhang Lu, researcher of the Technology and Engineering Center for Space Utilization under the Chinese Academy of Sciences.
Duration: 53 seconds
Release Date: Nov. 15, 2025
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