Where is the largest living organism on Earth?
Quick Answer
A massive Armillaria fungus in Oregon, USA, is often cited as the largest living organism. It spans an enormous underground area in the Malheur National Forest.
The Full Story
One of the best-known candidates for the largest living organism on Earth is an Armillaria fungus in Oregon, United States, in the Malheur National Forest. This fungal network spreads underground across a vast area and is connected as one genetic individual. Estimates have described it as covering many square kilometers, making it far larger in area than most people expect a single organism to be. Because much of it is hidden underground, it was identified through genetic analysis rather than by surface appearance. It is a striking example of how some organisms live as massive, interconnected networks.
Key Facts
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"The world’s biggest organism is mostly invisible underground."