A huge number of microorganisms lived at the Mir station, most of all fungi of the genus Penicillium
It turned out that they not only cause corrosion of aluminum alloys on Earth, but can also cause infections in people with weakened immune systems.
Scientists note that in case humanityis going to carry out the colonization of other planets, it is necessary to maximally clean the ships from fungi. Otherwise, judging by the fact that the mold can be in outer space, it can transfer to Mars and actively develop there.
Earlier, geomicrobiologists from Cardiff University in the UK discovered perhaps the oldest traces of living organisms on Earth.