102 years ago today, February 10, 1923 (December 25, 1922, the discoverer of X-rays, Roentgen, died. German physicist Roentgen On February 10, 1923, Wilhelm Conrad Roentgen, German physicist and discoverer of X-rays, died in Munich at the age of 77. In 1895, Rontgen discovered X-rays at the University of Würzburg in Bavaria. At that time, he discovered that the cathode ray tube was emitting new radiation. He named this ray X-ray because he did not yet know the properties of the ray at the time, and "X" was the mathematical code for the unknown. Just a few weeks later, the first X-ray was released showing an image of the bones of a human hand. Roentgen's discovery was quickly used by the medical community to diagnose diseases and detect foreign bodies in the body. Roentgen won the first Nobel Prize in Physics in 1901 for his discovery of X-rays. His discovery announced the arrival of the era of modern physics and revolutionized medicine.