X-rays were discovered in 1895 by the German physicist Wilhelm Conrad Röntgen. On November 8, 1895, Röntgen was experimenting with cathode rays and vacuum tubes when he noticed that a fluorescent screen in his lab started glowing due to an unknown type of radiation, which he called "X-rays" to denote their unknown nature. He then produced the first X-ray image using his wife's hand, which showed the bones inside. For this groundbreaking discovery, Röntgen was awarded the very first Nobel Prize in Physics in 1901.