On this edition of Conversations, Dr. Arturo Casadevall talks with host Dan Skinner about "What if Fungi Win?" Dr. Casadevall is an epidemiologist, professor, and inventor. He is the chair of the Department of Molecular Microbiology and Immunology at Johns Hopkins School of Public Health. He notes that while fungi provide up with many things necessary in our lives, it also poses a threat to humanity, which underscores the importance of studying it.