Marie and Pierre Curie proved the existence of the new element radium when they chemically isolated one-tenth of a gram of pure radium chloride.
17th December 497 BCE: The first Saturnalia festival celebrated in ancient Rome
17th December 2020
Marie and Pierre Curie proved the existence of the new element radium when they chemically isolated one-tenth of a gram of pure radium chloride.
Röntgen was experimenting with vacuum tubes at the University of Würzburg when he discovered the new ‘invisible light’ on 8 November 1895.