https://www.history.com/this-day-in-history/german-scientist-discovers-x-rays?cmpid=email-hist-tdih-2020- [login to see] 0&om_rid=
On November 8, 1895, physicist Wilhelm Conrad Röntgen (1845-1923) becomes the first person to observe X-rays, a significant scientific advancement that would ultimately benefit a variety of fields, most of all medicine, by making the invisible visible.