A Mars-Resistant Fungus Poses a Threat to NASA Missions: Are Sterilization Protocols About to Change?.

Aspergillus calidoustus Thrives Under Harsh Conditions

According to Novyny.live: New research reveals that the microscopic fungus Aspergillus calidoustus can withstand extreme environments similar to those found on Mars. This discovery could force a major overhaul of the sterilization standards used for spacecraft, a critical concern for upcoming missions to the Red Planet.

Out of 27 fungal strains tested, Aspergillus calidoustus proved to be the most resilient. It can endure:

• radiation,
• cold temperatures,
• low atmospheric pressure,
• and standard sterilization procedures.

The fungus's spores can survive up to six months when exposed to cosmic radiation, raising serious doubts about current decontamination methods. Even more concerning, the spores remained viable after two hours of dry heat treatment at approximately 125°C. Only a combination of intense cold and radiation was able to completely eliminate them.

Implications for Future Space Exploration

These findings may lead to a revision of the sterilization rules currently in place for spacecraft. In 2028, NASA plans to test the Space Reactor-1 Freedom vehicle, and the Psyche spacecraft is preparing for a close flyby of Mars. Given the hardiness of Aspergillus calidoustus, researchers may need to adjust their strategies to ensure the safety and success of these future missions.

The resilience of Aspergillus calidoustus presents a new challenge for space science, particularly in preventing biological contamination of other planets. Updating sterilization techniques will not only protect mission integrity but also reduce the risk of transferring Earth-based organisms to other celestial bodies—a key concern in astrobiology. This discovery underscores the need for continued research in this area as humanity's ambitions for space exploration grow.