Stay away from Death Cap! The science of mycology deals with all fungi. Both single-celled organisms such as yeast, and multicellular organisms such as mold or higher fungi mushrooms are of scientific interest for the mycologist. With great joy he is also refining his Sunday roast sauce with one of the approximately 30,000 species of mushroom. And now we are already in the kitchen. The whole family laughing themselves to death after eating because of the various fungal names.