Amadou is flammable and in ancient times was used to start and transport fires. Ötzi, the five-thousand-year-old “Ice Man” found mummified in an alpine glacier in 1991, was carrying a pouch in which he had a piece of amadou. Because of its antimicrobial properties, Fomes fomentarius was also used to dress wounds and preserve food. Stamets is so deep into the world of fungi there’s frequently one perched on top of his head.