In November 1895, Wilhelm Conrad Röntgen discovered X-rays, a new type of invisible radiation that can pass through the body and create images of bones and organs. His meticulous experiments not only revealed a new branch of physics but also transformed medicine by introducing diagnostic imaging. Röntgen’s wife, Anna Bertha, was part of this story—her hand was the subject of the very first X-ray picture, which showed her wedding ring and became a powerful symbol of the new invention. News about X-rays spread very fast. Within weeks, newspapers in Europe and the United States were reporting the discovery. This quick publicity helped bring X-rays from the laboratory into medical practice almost immediately. Today, X-rays are used every day in hospitals and clinics to diagnose broken bones, lung diseases, and many other conditions. They are also important in cancer treatment, dentistry, airport security, and scientific research. From Röntgen’s first experiment to modern technology, X-rays have become one of the most valuable tools in both medicine and science.