Labels:text | screenshot | font | colorfulness | graphic design | graphics OCR: DDAY IS X-Ray Discovery Day! CalCat! BF The Story ... Physicist Wilhelm Conrad Roentgen discovered X-Rays on November 8th 1895, beginning a new era in physics and medicine. Although X-rays have been observed previously, it was Roentgen, a professor at he University of Wurzburg (Germany), who successfully repeated x-ray experimentation and who is credited with the discovery.