Tough Fungus Could Survive the Trip to Mars
Scientists found a fungus that might endure a journey to Mars. Its name is Aspergillus calidoustus. Researchers collected it from NASA cleanrooms. These are ultra‑controlled spaces for building spacecraft. Nevertheless, some microbes adapt and persist there. This makes them important for planetary protection.
Testing Toughness
The team exposed fungal spores to simulated Mars conditions. These included extreme cold, radiation, and low pressure. They also mimicked the vacuum of space travel. Most microbes died under the harshest tests. However, A. calidoustus survived nearly every stress. Only a combination of very low temperatures and high radiation killed it.
Fungi are less studied than bacteria in space research. Yet their spores are naturally resilient. They tolerate drying, radiation, and nutrient scarcity. These traits match spaceflight conditions. “Microorganisms can possess extraordinary resilience,” says study leader Dr. Kasthuri Venkateswaran.
Cleanroom Clues
NASA cleanrooms are extremely clean. But certain microbes evolve tolerance to disinfectants and low moisture. Therefore, a cleanroom survivor may already be pre‑adapted to space stresses. This study provides some of the first evidence that complex cells (eukaryotes) could persist across all mission phases.
Better Planetary Protection
The findings do not mean Mars contamination is likely. However, they help quantify microbial survival risks. “This refines NASA’s planetary protection strategies,” Venkateswaran adds. Future missions can now assess risks more accurately.
