This 2,400 Year Old Mushroom Is The Largest Living Organism On The Planet

Okay, so the above image is total bunk. The fungus actually looks like a white slime on and within the bark of (mainly) Ponderosa Pine trees and sends out black tendrils underground, only taking on the more familiar mushroom cap shape in the fall months. The largest concentration of Armillaria encompassed 3.5 square miles of forest as of 2015, so one can only speculate what four additional years of growth have done. (That's one giant mushroom, folks! / D. Redecker, 2000)