NASA Finds International Space Station Too Sterile.

Astronauts have long grappled with skin irritations and immune system challenges while orbiting above Earth. Recent research published in the prestigious journal Cell has suggested that the hyper-sanitized environment of a spacecraft may contribute to these issues.

Scientists at the University of California, San Diego, scrutinized the International Space Station (ISS) carefully. They found that the station lacked the diverse array of natural microbes that humans typically encounter on Earth. The overuse of disinfectants appeared to be correlated with the reduced microbiome diversity on the space station.

This depletion of natural bacteria on the ISS is concerning, as it may impact the astronauts’ immune systems. The presence of fewer microbial species on the station compared to Earth-based buildings has prompted researchers to advocate for intentionally fostering more diverse microbial communities in built environments.

Moving forward, scientists are exploring the potential benefits of introducing certain environmental organisms into spacecraft to aid astronauts in combating skin irritations and inflammation. This approach could be beneficial not only in space settings but also on Earth in buildings, hospitals, and other sterile environments.

The concept of balancing microbial diversity in closed environments is gaining traction, with the idea of incorporating “green zones” or living walls in future spacecraft to introduce healthy microbes while keeping pathogens at bay. This shift from a strict “kill everything” approach to a more nuanced microbial management strategy holds promise for creating healthier and more balanced environments, both in space and on Earth.