The largest living organism on Earth is a giant fungus in Oregon

The largest living organism on Earth is a giant fungus in Oregon that covers over 2,200 acres (890 hectares) and is estimated to be over 2,400 years old:

The fungus is capable of decomposing trees and other organic matter, which allows it to extract nutrients from the soil and continue growing. Despite its impressive size and longevity, the giant fungus is largely hidden from view, as it exists underground and can only be detected through its visible fruiting bodies, which resemble mushrooms.