Microbes from Earth could survive on parts of the moon’s South Pole, according to a study published on August 19, 2026, in the journal TPR by NASA researchers and colleagues. The research examined whether microorganisms hitchhiking on human space missions could endure the extreme lunar environment, finding specific survivable niches
in shaded nooks, crevices, and craters where the sun never climbs high in the sky.
NASA Study Finds Earth Microbes Could Survive at Moon’s South Pole
Previous scientific work indicated that ultraviolet rays and solar heat made the lunar surface too harsh for microbial life. However, the new paper analyzed how the terrain’s hills, valleys, bumps, and craters provide shelter. Researchers simulated three specific regions near the lunar South Pole that may become landing sites for upcoming crewed Artemis missions: Nobile Rim, Connecting Ridge, and De Gerlache Rim. These simulations combined detailed environmental maps from elevation and temperature data collected by instruments aboard NASA’s NASA with models of how radiation strikes the surface.
Implications for Artemis Missions and Space Contamination
Carrying microorganisms from Earth to the moon is inevitable. Humans have roughly one million bacteria living on each patch of skin the size of a pencil eraser, and these bacteria can vent from spacesuits and habitats during spaceflight. While robotic spacecraft can be baked at temperatures above 400 degrees Fahrenheit to reduce living organisms, such sterilization is not possible with crewed missions.
The study evaluated three kinds of bacteria and two kinds of fungi commonly found on crewed space missions, including the UV-resilient Aspergillus niger fungus. Researchers noted that survival in this context means microbes can stay alive for a single 24-hour period or up to seven days in a stagnant, cryptobiotic state of suspended animation, rather than actively growing and reproducing over time. For active growth to occur, the moon would need habitable conditions such as liquid water, for which there is currently no evidence.
Our findings show that we need to be even more thoughtful about the materials that we might unintentionally take with us when we are exploring space, and the impacts that we might have,
study co-author Heather Graham, an organic geochemist at Space in Greenbelt, Maryland, told Space.com. Study co-author Prabal Saxena added that even a bootprint or a rover’s tread might create a habitable area.
Testbed for Future Human Exploration of Mars
The findings present a double-edged sword for space exploration. While offering a significant development in researching the sustainability of microbial life on the moon, the survivability makes it easier to bring terrestrial contamination and more difficult to distinguish between the moon’s natural chemistry and human introduction. Understanding this footprint is considered essential when searching for signs of life beyond Earth.
Researchers emphasized that studying microbial persistence in South Pole niches will serve as a crucial testbed for future potential human exploration of Mars, which likely features far more habitable environments. We need to understand what was there before us because when we go to Mars to search for signs of life beyond our planet, we will want to make sure it's not stuff we brought,
researcher Andrew Needham said in a TPR. Rather than avoiding these niches entirely, the paper concluded they could instead be targeted for sample acquisition using a well-thought-out sampling strategy.
