A team led by the Society for the Protection of Underground Networks has mapped Earth's arbuscular mycorrhizal fungi for the first time: 110 quadrillion kilometres of living thread in the top 15 centimetres of soil, roughly 40 per cent of it beneath grassland. The post Scientists mapping the underground fungal networks that link tree roots estimate the threads stretch for 110 quadrillion kilometres worldwide, enough that laid end to end they would reach from Earth to the Sun nearly a billion tim