Fungi exist in various habitats, including deep down in the ocean, lakes, rocks, deserts, very salty environments, and areas of extremely high or low temperatures. Some can prevail even after being exposed to intense UV and cosmic radiation as one would encounter during space travel. During the 13 years the Mir space station was in orbit, a great deal of equipment was continuously being damaged by mutated fungi that had been breeding in the space station. At first technicians were puzzled and thought the problems must have been due to faulty workmanship. The majority of fungi live on land.