Beneath our feet lies a fungal superhighway stretching 68 quadrillion miles ScienceDaily Subterranean fungi networks more than 100 quadrillion km in length, study finds The Guardian Earth's Underground Fungus Network Is So Gigantic That If You Stretched It Out, It Would Reach to Other Star Systems Futurism 68 Quadrillion Underground Miles of Fungi The New York Times Study maps quadrillion-mile fungus web lurking in the topsoil National Post