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The World's Largest Living Organism is a Fungus

The Armillaria ostoyae fungus, also known as the honey mushroom, covers over 2,200 acres in Oregon, USA. This massive fungal colony is estimated to be around 2,400 years old, making it the oldest living thing on Earth. Discovered in 1998, it is considered a single organism due to its vast network of interconnected hyphae, which allows it to share nutrients and reproduce. The fungus grows by sending out underground tendrils, slowly expanding its territory over time.