Researchers tested 64 types of mushroom strains to find which grows the strongest mycelial mats for making eco-friendly materials to replace plastic and other fossil fuel products. They discovered that Ganoderma lucidum, a medicinal mushroom, produces especially thick and strong mycelium that can be grown at large scales. By using the right nutrients like glycerol and skim milk, they were able to grow large sheets of mushroom material that could potentially be used for packaging, furniture, and other products instead of traditional plastics.