Kombucha bacteria can survive on Mars.

An international team of scientists sent a kombucha into outer space - it was grown for a year and a half on the outside of the ISS. After that, they were returned to Earth, reactivated and cultivated for another 2.5 years. As a result of the experiment, the microbial ecology of kombucha cultures was disturbed. But the cellulose-producing bacteria Komagataeibacter survived. This means that bacterial cellulose is most likely responsible for the survival of microorganisms in extraterrestrial conditions. That is, it can serve as a biomarker for alien life. Also, on the basis of bacterial cellulose, it will be possible to make a protective layer on items needed by the future space colonizer.