An 11.9 Light-Year Journey
Underground fungi encircle the Earth with their filaments. These hyphae transport water and nutrients between themselves and plants. Among these species, some do not produce any visible structure, such as a cap. This form of symbiosis, known as arbuscular mycorrhiza, is an essential link in the chain of life.
Through sampling, their scale has been precisely assessed: the total biomass of these fungi is five times greater than that of the entire human population. What’s more, if laid end to end, their filaments would span the distance round trip to Proxima Centauri, the star closest to us.