A hidden fungal network longer than the distance to the Sun wraps the roots of 70% of Earth's plants, and the first global map finds it densest not under rainforests but wild grasslands

Open a map app and you can trace almost anything above ground. One of the planet’s largest living systems had no such map. Now researchers have mapped the underground fungi network. The web runs underground, wrapped around the roots of nearly every p... [5093 chars]