This book is a biography of Dr. Earl H. Wood. Dr. Wood  was one of Mayo Clinics most prominent researchers, best known for his ground-breaking work on the G-suit during World War II.  In 1942, Earl was recruited by Mayo Clinic to conduct research on gravitational physiology on their human centrifuge. Using themselves as experimental subjects, he and fellow scientists investigated the effects of acceleration and the cause of gravitational loss of consciousness. The result was a vastly improved G-suit, which allowed Allied pilots to outmaneuver Japanese and German planes and win the air battles of World War II. Following the war, Earl continued his research, pioneering cardiac catheterization on patients with heart disease. The oximeter, which he developed to detect pulse, was enhanced to measure blood oxygen saturation levels; it is now used in every hospital and clinic in the world and is of critical importance in monitoring cardio-pulmonary status during the COVID19 pandemic. In