This review examines the intricate underground networks formed by arbuscular mycorrhizal fungi, which partner with most land plants to help them absorb nutrients from soil. These fungal networks are far more complex and dynamic than previously recognized, expanding through the soil in coordinated wave-like patterns and responding flexibly to changing environmental conditions. The research highlights that viewing these fungal networks as a unified, responsive system rather than separate parts can help us better understand how they support plant growth and maintain healthy ecosystems.