Who was born first, Celedonio Calatayud or Wilhelm Conrad Röntgen?
Celedonio Calatayud: Celedonio Calatayud Costa (] ) October 29, 1880 in Pedreguer – January 24, 1931 in Madrid) was a Spanish scientist and radiologist, remembered for his achievements on radiology, radiotherapy, and electrology. Wilhelm Röntgen: Wilhelm Conrad Röntgen ( ; ] ; 27 March 1845 – 10 February 1923) was a German mechanical engineer and physicist, who, on 8 November 1895, produced and detected electromagnetic radiation in a wavelength range known as X-rays or Röntgen rays, an achievement that earned him the first Nobel Prize in Physics in 1901.
Wilhelm Conrad Röntgen