This post is for fans of the television series The Last of Us. The blue whale is the biggest animal on Earth, but it’s not Earth’s biggest life form. No, the blue whale pales in comparison to the actual largest living thing on the planet: the humongous fungus (Armillaria ostoyae), also known as honey fungus. This fungus is located in Malheur National Forest and covers an area of about three-and-a-half square miles. Now that is truly humongous.