Biofilms: Paving the Way for Space Exploration and Life

Research into microorganism communities known as biofilms is increasingly revealing their potential for both sustaining life on Earth and enhancing future space exploration. A recent study published in *npj Biofilms and Microbiomes* investigates how biofilms could be utilized in spaceflight, examining their historical significance and current applications. This international collaboration addresses both the benefits and challenges of using biofilms in the unique conditions of space.

The study begins with a comprehensive review of biofilms, emphasizing their role in the emergence of early life on Earth. Biofilms are complex communities of microorganisms that have significant implications for human health and agricultural productivity. In the context of spaceflight, researchers explored how the microgravity environment disrupts biofilm structure and function, impacting gut-biofilm interactions and the relationship between biofilms and plants in the rhizosphere—the soil zone surrounding plant roots.

Utilizing data from the NASA Open Science Data Repository (OSDR), the researchers identified several promising applications for biofilms in space. These include advancements in precision and regenerative medicine, as well as agricultural enhancements that could increase crop yield and quality while minimizing the use of chemical pesticides. The study suggests that tailored biofilm communities could enable in situ pharmaceutical production, reducing the reliance on medical resupply missions from Earth.

“Biofilms have supported life since primordial Earth,” the study concludes, highlighting the dual role of biofilms as both potential health risks and valuable biological tools. The research emphasizes that biofilm inquiry based on Open Science principles can lead to innovative technologies that support deep-space exploration and generate sustainable benefits on Earth.

This study builds on more than two decades of research into biofilms in space. Earlier investigations, including a 2025 paper published in *Science of Biofilms*, simulated microgravity conditions to observe biofilm growth. Another study in the *Journal of Microbiology* in the same year examined biofilm development in space, discussing associated risks and mitigation strategies. Additionally, a 2023 paper in *npj Microgravity* delved into biofilm formation under space conditions.

NASA has been investigating biofilms for decades, focusing on how these communities behave differently in space compared to on Earth. In microgravity, biofilms have been observed to adhere more readily to surfaces, posing risks to equipment and astronaut health. These communities can resist antimicrobials and antibiotics, leading to potential complications in maintaining critical systems aboard spacecraft. The closed environment of space missions raises further concerns, as biofilms can clog water systems, corrode metals, and damage air filtration systems essential for providing oxygen and removing carbon dioxide.

One of the most extensive research projects on biofilms in microgravity is the Characterization of Biofilm Formation, Growth, and Gene Expression on Different Materials and Environmental Conditions in Microgravity (Space Biofilms) investigation conducted aboard the International Space Station (ISS). Astronauts have been studying the complex processes governing biofilm growth and development in this unique environment. Findings from this research not only contribute to understanding biofilms in space but also have implications for mitigating health hazards associated with biofilms on Earth.

The exploration of biofilms is just one facet of the ongoing research aimed at supporting human space exploration, whether on the ISS, the Moon, or Mars. While biofilms present challenges, their potential applications could significantly enhance the capabilities and sustainability of future space missions. As scientists continue to uncover the mysteries of biofilms, their contributions to spaceflight and Earth-based solutions remain an exciting area of inquiry.