Ships in 1-5 business days: Sexually transmitted diseases, cholera, parasites... Great scientists who saved humanity from crises challenged reckless human experiments, sacrificing themselves!The author, a scientist themselves, humorously introduces episodes of scientists who built the foundation for today's safe medical care and convenient transportation by conducting dangerous experiments on their own bodies, believing in their theories.Eighteenth-century physician John Hunter, the father of anatomy, tested the transmission routes of gonorrhea and syphilis by applying pus from a gonorrhea patient to his own genitals. Nineteenth-century physician William Murrell nearly fainted after licking nitroglycerin, but intuitively felt it had an effect similar to a vasodilator. He continued self-administration, which led to its establishment as a treatment for angina. In the 20th century, Jack Haldane repeatedly conducted experiments with rapid pressurization and depressurization in a hyperbaric chamber to establish diving methods; it is said his eardrums ruptured and his dental fillings exploded.This book is packed with extraordinary stories of mad scientists who challenged the dangers of radioactivity, anesthetics, cholera, plague, and more, using their own bodies. While roaring with laughter at their courage and recklessness, readers will gain insight into their true scientific spirit in this excellent work.