This podcast interviews Carl Zimmer, author of "Airborne," about the history of understanding airborne diseases. The conversation traces how our understanding of disease transmission evolved from the miasma theory to germ theory, highlighting the significant role of aerobiology and its unexpected connection to biological warfare research. Zimmer discusses the surprising prevalence of life in the air, including bacteria in clouds and the potential benefits and risks of the "aerobiome." A key takeaway is the need for improved building ventilation to mitigate airborne disease transmission, a lesson learned from the COVID-19 pandemic. The interview concludes with a call for further research into the global aerobiome and its impact on human health.