The Expedition 74 crew on board the International Space Station (ISS) had a productive week, with a range of research activities, maintenance tasks, and opportunities to take in the stunning views of Earth from low Earth orbit. The crew, which includes astronauts from NASA, JAXA, and Roscosmos, spent the week of December 8-12, 2025, working on various experiments and tasks, including a study on stem cells in microgravity and an experiment on the vestibular system conducted by Roscosmos.
One of the key research activities undertaken by the crew was the study of stem cells in microgravity. This research aims to understand how microgravity affects the behavior and development of stem cells, which has potential implications for our understanding of cellular biology and the development of new treatments for diseases. The crew also conducted an experiment on the vestibular system, which is responsible for balance and orientation, to better understand how microgravity affects this system and how it can be mitigated for future long-duration space missions.
In addition to research activities, the crew performed routine maintenance tasks to ensure the continued operation of the ISS. This included work on the station"s systems, such as the toilet, as well as the installation and soundproofing of the JEM Demonstration of CO by JAXA astronaut Kimiya Yui. The crew also took time to capture stunning views of Earth from the ISS, which included gorgeous skies of blue and clouds of white.
The Expedition 74 mission is part of a long-term program of research and development on the ISS, which has been continuously occupied by astronauts and cosmonauts since 2000. The station provides a unique laboratory for scientists to conduct research in microgravity, which can lead to breakthroughs in our understanding of physics, biology, and other fields. The ISS also serves as a testbed for the development of new technologies and strategies for long-duration space missions, such as those planned for the Moon and Mars.
The significance of the Expedition 74 mission extends beyond the specific research activities and maintenance tasks undertaken by the crew. It highlights the importance of international cooperation in space exploration and the value of the ISS as a platform for scientific research and technological development. The mission also demonstrates the capabilities and resilience of the astronauts and cosmonauts who live and work on the ISS, and the critical role they play in advancing our understanding of space and our ability to explore it.