Scientists have calculated the staggering extent of underground fungal networks to be 700 million times the distance from Earth to the Sun. The research, conducted by the Society for the Protection of Underground Networks (Spun) and published in the journal Science, mapped what is often called the "wood wide web" – the hidden fungal systems linking plant roots across the globe. They revealed the network spans 68 quadrillion miles beneath Earth's surface. To grasp this extraordinary scale, the ne