Mycelium is a vegetative part of a fungus (i.e. technically a mushroom) that is made of underground wires creating an ever-growing network. By giving it a defined structure to grow, mycelium is able to form a strong, breathable and fire-retardant material that could replace plastic, textiles, wood and cement among others. Mycelium materials are also being tested to be used as acoustic absorber, packaging materials, and building insulation. Even NASA is currently researching using mycelium to build sustainable habitable dwellings on Mars. Isn’t that enough to call it a sustainable material of the future?