In the late 1980s, researchers discovered the biggest organism on record, a “humongous fungus” on Michigan’s Upper Peninsula that covered 37 hectares, about the same size as the Mall of America in Bloomington, Minnesota. Now, the same team of scientists has found that this Armillaria gallica, which gives rise to honey mushrooms (above), is about four times as big—and twice as old—as they originally thought.
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