Which fungus is the oldest known living organism?
Quick Answer
A honey fungus in Oregon is often estimated to be thousands of years old, possibly around 2,400 years or more. Exact ages are difficult to prove because fungi spread underground.
The Full Story
Some honey fungus individuals, including Armillaria ostoyae in Oregon, are believed to be among the oldest living organisms on Earth. Researchers estimate the organism may be at least 2,400 years old, though exact dating is difficult because the fungus is mostly underground. The visible mushrooms are only temporary fruiting bodies of a much larger organism. This makes fungi especially hard to measure compared with trees or animals.
Key Facts
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