Space fungus is a thing. https://www.space.com/fungus-in-space-long-duration-astronaut-missions https://www.space.com/fungus-in-space-long-duration-astronau...

Space fungus is a thing. https://www.space.com/fungus-in-space-long-duration-astronaut-missions https://www.space.com/fungus-in-space-long-duration-astronau... > In 1988, astronauts aboard the now-retired Russian space station Mir realized that something had blanketed one of their windows — from the outside. [...] This fungi had managed to adapt to the space environment, and so well that it not only survived but thrived on windows, control panels, air conditioners and cable insulators. It even contaminated the crew's precious food and water supply. Not a one-time event.