Scientists found a 200 acre fungus growing in Michigan's Upper Peninsula that's some 2,500 years old. They've dubbed it the "Humungous Fungus," and say the secret of its longevity is in its remarkably stable genome.

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Scientists found a 200 acre fungus growing in Michigan's Upper Peninsula that's some 2,500 years old. They've dubbed it the "Humungous Fungus," and say the secret of its longevity is in its remarkably stable genome.