Chernobyl’s Mysterious Black Fungus: Has It Really Evolved the Power To Feed On Radiation? | World News
Chernobyl Fungus Appears to Have Evolved: Almost four decades after the devastating explosion at the Chernobyl Nuclear Power Plant, the exclusion zone remains one of the most dangerous places on the planet. While humans cannot withstand prolonged exposure here, some organisms have more than endured, adapting, evolving and, in some cases, growing from extreme exposure to radiation. Among them is a strange black fungus that scientists believe does something extraordinary: use radiation as an energy source.
Life in the Restricted Zone
When researchers first entered the structures surrounding the Chernobyl reactor in the late 1990s, they expected to find a lifeless environment.
Instead, a team led by microbiologist Nelli Zhdanova discovered an entire fungal community of 37 species living in walls saturated with radiation levels that would be lethal to humans.
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Many of these fungi were dark or black and rich in melanin pigment, which protects human skin from UV radiation.
However, one species stood out: Cladosporium sphaerospermum, which was dominant in contaminated samples.
Fungus Developing Under Radiation
What surprised scientists even more was what happened next. A research team led by radiopharmacologist Ekaterina Dadachova and immunologist Arturo Casadevall exposed C. sphaerospermum to intense ionizing radiation, the type that normally destroys DNA and kills living cells.
Instead of dying, the fungus grew faster.
Ionizing radiation is powerful enough to knock electrons out of atoms, break molecules apart, and break down genetic material. It is used in cancer treatment because it is very effective in destroying cells. But this fungus not only tolerated it, but also appeared to thrive.
A Radical Theory: Could Fungi Be “Eating” Radiation?
In 2008, Dadachova and Casadevall proposed a bold theory: The fungus might be doing something similar to photosynthesis, but instead of using light, it might be using radiation.
They called this idea radiosynthesis.
Here is the logic:
- Melanin in the fungus absorbs radiation.
- Radiation appears to change the physical properties of melanin.
- This change may help the fungus convert radiation into usable chemical energy.
- This will allow melanin to act as a protective shield and potential energy-harvesting pigment, similar to how chlorophyll works in plants.
It sounded like science fiction, but experiments continued to fuel the mystery.
Space Experiments Deepen the Mystery
In 2022, a team attached C. sphaerospermum to the outside of the International Space Station, exposing it to harsh cosmic radiation. Sensors placed under the cork layer recorded lower radiation levels compared to control samples.
This did not prove radiosynthesis, but it did show that the fungus could act as an extremely effective radiation shield.
Scientists have even begun to consider whether melanized fungi could be used to protect astronauts on deep space missions.
Yet the real mystery remains unsolved.
Radiosynthesis: Cool Theory, Unproven Reality
Despite years of research, no one has been able to show conclusively that the fungus actually converts radiation into energy.
Scientists have not yet observed:
- radiation-based carbon fixation,
- Measurable metabolic gain from radiation, or
- an open energy-producing pathway.
As Nils Averesch of Stanford University points out, the idea is fascinating but unsubstantiated.
The fungus does something unusual with radiation, but the exact mechanism remains secret.
Not All Melanized Fungi Behave the Same
Compared to other mushrooms, the mystery gets even deeper:
- Wangiella dermatitidis grows better under ionizing radiation.
- Cladosporium cladosporioides produces more melanin but does not grow faster.
- Only C. sphaerospermum shows this particular combination of robustness and potential radiation-induced benefits.
This discrepancy suggests one of two possibilities: Either the fungus has evolved a unique adaptation to radiation, or its unusual behavior is a stress response that helps it survive extreme conditions.
Surviving Where People Can’t Tread
Whatever the explanation, one thing is clear: This velvety black fungus has evolved an extraordinary strategy to survive in one of the most hostile environments known to humans.
Chernobyl remains very dangerous for humans, but this modest organism thrives in what should have been deadly conditions, clinging effortlessly to the radioactive walls. Whether through radiosynthesis or some other unknown mechanism, it continues to challenge our understanding of life and resilience.
As many scientists who study this subject put it: Life always finds a way, sometimes in the most unexpected way imaginable.
