This episode of the "Origin of Everything" series, titled "Origin of Everything: Why Do We Wash Our Hands After Going to the Bathroom?" explores the evolution of hand-washing from religious rituals to a vital hygiene practice. The episode sheds light on Dr. Ignaz Semmelweis, a Hungarian physician who first advocated for hand-washing to prevent puerperal fever, facing resistance from the medical community due to the non-acceptance of germ theory. The episode discusses cultural practices concerning cleanliness in religions like Islam, Judaism, and Buddhism while highlighting key historical figures such as Rebecca Davis and Louis Pasteur. The Centers for Disease Control and Prevention's (CDC) guidelines on hand hygiene are also discussed, emphasizing its importance in disease prevention. Perfect for educational settings, the video combines history, culture, and science to promote awareness about the historical context and contemporary necessity of hygiene practices.