December 28: Röntgen published a paper on the discovery of X-ray (1895)

Wilhelm Conrad Röntgen, a German physicist, published a paper about a new type of radiation, which was later known as X-ray. The discovery of X-ray, based on experiments, were made on November 8, 1895 and the result was summarized and published on this date. He did not want to apply for any patent related to his discovery and wanted mankind to benefit from practical applications of the discovery. This achievement earned him the first Nobel Prize in Physics in 1901. As we all know and benefit from the discovery, X-ray improved the quality of our lives, not only in medicine but also in many areas of engineering.