Definition
Karl Landsteiner was a pioneering scientist whose work revolutionized the field of medicine. He is best known for discovering the major human blood groups. His research made blood transfusions safe and effective, saving countless lives. He also identified the Rh factor, further enhancing blood compatibility. Think of him as a medical detective, unlocking the secrets of blood. He was awarded the Nobel Prize for his groundbreaking contributions. His work continues to impact medical practices worldwide.