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.
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12th July 1561: The consecration of Saint Basil’s Cathedral in Moscow
12th July 2019
20th April 2018
20th April 1902: Marie and Pierre Curie prove the existence of radium
11th November 1918: WW1 Armistice of Compiègne is signed
11th November 2018
1st September 1939: Nazi Germany invades Poland
1st September 2018