Forget capes and spandex—the real superheroes of forest restoration wear hyphae. In Scotland, scientists are mapping the underground fungal web that keeps trees alive and entire ecosystems humming. With less than 1% of Britain’s ancient hazelwoods left, the Society for the Protection of Underground Networks (SPUN) is on a spore-fueled mission to restore life through the ultimate symbiotic alliance: tree + fungus. Turns out the future of forests depends on the tiniest architects in the dirt.