Jenny Blamey has spent years scraping bacteria from some of the coldest, most inhospitable corners of Antarctica. Now the Chilean biochemist wants to find out whether those same organisms can survive somewhere even harsher: the vacuum of space outside the International Space Station.
Blamey, who leads Fundación Biociencia in Santiago, plans to send cold-adapted microorganisms, known as extremophiles, to the ISS for direct exposure to cosmic radiation, ultraviolet bombardment, and near-absolute-zero temperatures. The experiment is designed to test a straightforward but profound question: if life can endure the deep freeze of Earth’s polar regions, could it also persist on icy worlds elsewhere in the solar system?
From Antarctic ice to orbit
In an interview published by NASA’s Spanish-language science portal, Blamey explained the reasoning behind the project. “Las condiciones son similares en términos de temperaturas,” she said, noting that Antarctic environments share key thermal characteristics with the surfaces of moons like Europa and Enceladus. Both of Jupiter’s and Saturn’s respective moons are believed to harbor liquid water beneath thick ice crusts, making them prime targets in the search for extraterrestrial life.
Blamey’s research group has collected psychrophilic (cold-loving) bacteria and archaea from Antarctic sites where temperatures plunge well below minus 20 degrees Celsius and organisms cling to existence in glacial ice, volcanic soils, and subglacial sediments. These microbes have already demonstrated remarkable resilience on Earth. The open question is whether that toughness translates to the far more extreme conditions of low Earth orbit, where organisms face unfiltered solar UV, heavy-ion cosmic rays, and pressures close to a perfect vacuum.
Building on established science
The concept of exposing extremophiles to space is not new. The European Space Agency’s EXPOSE facility, mounted on the ISS exterior, hosted experiments between 2008 and 2015 that subjected bacteria, lichens, and fungal spores to open space for up to 18 months. Several organisms survived, including the hardy bacterium Deinococcus radiodurans. Those results demonstrated that certain terrestrial life forms can tolerate conditions once thought to be universally lethal.
NASA runs its own microbial research program through the Ames Research Center, studying how microorganisms respond to microgravity, radiation, and temperature swings aboard the station. A 2024 technical report published through the NASA Technical Reports Server describes an aseptic sampling kit designed to collect microbiological samples from the ISS exterior during spacewalks, using genetic sequencing to identify whatever is found. That infrastructure shows the station is already equipped for the kind of external-exposure microbiology Blamey’s team proposes.
What distinguishes the Chilean project is its focus on organisms drawn specifically from Antarctic polar environments, chosen because their native habitat most closely mirrors conditions on the icy moons that upcoming missions will target.
What remains to be confirmed
As of April 2026, several key details about the experiment have not been publicly documented. No press release from Fundación Biociencia or Chile’s national space agency specifies the exact microbial strains selected, the Antarctic collection sites, or the funding sources supporting the work. The precise launch date, the ISS module or external platform where the samples would be mounted, and the planned duration of exposure have not been announced.
The nature of any formal partnership between Blamey’s group and NASA also remains unclear. While NASA’s Ames microbiology page confirms the agency routinely conducts space-exposure experiments, it does not list the Chilean project by name. Whether the team has secured a dedicated experiment slot or plans to integrate samples into an existing mission has not been disclosed in primary sources reviewed for this report.
Blamey’s published statements represent a declaration of research intent and scientific reasoning, not confirmed experimental results. Until peer-reviewed data from actual space exposure tests become available, her claims about microbial survival potential remain a hypothesis under active investigation.
Why planetary protection hangs in the balance
The stakes of this experiment reach well beyond Antarctic biology. Every robotic probe sent to Mars, Europa, or Enceladus undergoes rigorous sterilization procedures governed by international planetary protection protocols. Those rules, maintained under the Committee on Space Research (COSPAR), are designed to prevent Earth organisms from hitching a ride to other worlds and contaminating environments where native life might exist.
If Blamey’s Antarctic extremophiles survive prolonged exposure to the space environment outside the ISS, it would raise pointed questions about whether current sterilization standards are strict enough. NASA and the European Space Agency are both developing missions to icy moons: NASA’s Europa Clipper is already en route to Jupiter’s moon, and ESA’s JUICE spacecraft is headed for the Jovian system as well. Both missions were designed under existing contamination rules. Evidence that polar bacteria can endure space-like conditions would add urgency to debates about tightening those rules before landers eventually touch down on destinations across the solar system where liquid water may lie just beneath the surface.
Even a negative result, microbes that fail to survive, would carry scientific value. It would help define the outer boundaries of biological resilience and provide reassurance that current sterilization measures may be adequate for near-term missions.
What to watch for next
The most important milestone will be the publication of peer-reviewed results from the actual exposure tests. Those findings will determine whether Antarctic extremophiles belong in the same category as the handful of organisms already known to tolerate open space, or whether Earth’s polar microbes meet their match in orbit. For researchers tracking the intersection of astrobiology and planetary protection, Blamey’s experiment offers a concrete, testable contribution to a debate that has been largely theoretical for decades. The data, whenever they arrive, will speak louder than any analogy.
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*This article was researched with the help of AI, with human editors creating the final content.
