But Stamets’s aspirations for the fungal kingdom go well beyond turning petrochemical sludge into arable soil. Indeed, in his view there is scarcely an ecological or medical problem that mushrooms can’t help solve. Cancer? Stamets’s extract of turkey tail mushrooms (Trametes versicolor) has been shown to help cancer patients by stimulating their immune systems. (Stamets claims to have used it to help cure his mother’s stage 4 breast cancer.)

