What is the world's largest living creature? It may be a fungus that scientists have discovered in the state of Wisconsin. This fungus is huge-it spreads over about thirtyseven acres and is still growing. This may seem like a science fiction nightmare, but in fact the fungus lives underground in the woods and does not disturb its environment. It also grows very slowly, having taken 1,500 years to reach its present size. Scientists used to think that this fungus was made up of many different fungi. Now, with DNA testing, they have definite proof that it is really ●●●●.