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The Humongous Fungus: The Largest Living Organism on Earth
Deep beneath the forests of eastern Oregon lives a creature so enormous that most people walk over it without ever realizing it's there.
It isn't an animal.
It isn't a tree.
It's a fungus.
A Forest Hidden Underground
The **Humongous Fungus** is a giant honey fungus known scientifically as **Armillaria ostoyae**.
Although small mushrooms occasionally appear above the ground, they are only the visible fruiting bodies.
The real organism is hidden below the surface.
It spreads through an enormous underground network of thread-like structures called **mycelium**.
Bigger Than You Can Imagine
Scientists discovered that what appeared to be many separate fungi were actually one gigantic organism.
Today, it is estimated to cover approximately **2,385 acres (965 hectares)**.
That's nearly **four square miles**.
To put that into perspective, the fungus is larger than:
◎ About 1,600 football fields
◎ New York City's Central Park
◎ Many small towns
How Old Is It?
Researchers estimate the fungus is at least **2,400 years old**, although some studies suggest it could be considerably older.
Because fungi grow slowly underground, determining their exact age is extremely difficult.
Is It Dangerous?
The fungus feeds on the roots of trees.
It can weaken or kill stressed trees, making it an important part of forest ecosystems.
While it may sound destructive, it also helps recycle nutrients and create space for new growth.
Nature's Hidden Giant
Most visitors to Oregon's **Malheur National Forest** never realize they're standing on one of Earth's greatest natural wonders.
Visible only through scientific investigation, the Humongous Fungus reminds us that some of the planet's most incredible life forms remain hidden just beneath our feet.