Study Shows Moss Endured Nine Months in Space
In 2022, spores of Physcomitrium patens were placed on the exterior of the International Space Station, enduring nine months of relentless exposure to vacuum, radiation, and drastic temperature swings.
Upon their return to Earth, scientists discovered that more than 80% of the spores remained viable and capable of reproduction, according to a study published Thursday in iScience.
“The spores retained their vitality after nine months in open space,” the study said. Researchers believe the spore-protecting structures, known as sporangia, may shield the moss from ultraviolet radiation, heat, and intense light.
The results underscore the durability of bryophytes, a plant group that includes mosses, and hint at practical applications for space exploration, such as planetary greening initiatives and life support systems.
“Understanding life’s survival limits is important for addressing global challenges and supporting future human habitation beyond Earth,” the study said.
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