Types and sources of microorganisms on the outer surface of the Russian space station.

Are there any living things alive in space with harsh living conditions? To answer this question, Russian researchers took multiple samples from the outer surface of the International Space Station and found fragments of DNA (deoxyriucleic acid) from six microorganisms, spores from one fungus and one bacteria that could survive in space, some of which may have come from Earth.
THES astronauts took 19 samples from fine sediment on the outer surface of the space station's capsule during several spacewalks between 2010 and 2016 and brought them back to Earth in isolation, the Russian National Space Group said in a Press Release on May 29.
Experts from the Central Machine Manufacturing Research Institute, a space research institute affiliated with the Russian Space Group, and the Institute of Medical Biology of the Russian Academy of Sciences, after conducting molecular biology studies and tests on the above samples, found the living spores of the bacteria of the genus Bacillus spores and the genus Glycerine, and found them about 45% of the total number of tests.
dna fragments of another mycobacterium mycobacterium bacteria, whose "master" may be plankly bacteria in the Barents Sea in northwest Russia.
addition, the researchers found DNA fragments from the fungus of the yeast genus, the genus cystic fungus, the genus Delft and the primitive ancient bacteria in sediments outside the International Space Station.
These broken genetic materials are found about 70 percent of the total number of tests. Experts at the Russian Space Group point out that the academic community generally believes that the "upper limit" of the Earth's biosphere is 10,000 meters above sea level, and that if future studies can confirm that the bacteria that survive outside the International Space Station do originate on Earth, or that the "master" of the above-mentioned DNA fragments has a home outside the station and its home is Earth, then the boundary of the Earth's biosphere may be rewritten.
addition, Russian researchers speculated that the microbes and their cellular material may not have been carried into space during the liftoff of the ISS modules.
that life material originating from the Earth can enter near-Earth space by floating away from the Earth's dense atmosphere.
So the space station, which operates in orbit about 400 kilometers above the Earth's surface, will be a great facility to study whether and how suspended microbes can "escape" from Earth, and its findings are expected to be used to protect the shells of future deep space probes and interplanetary space stations.
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