Spouse
1911
Jul 26
| 1911 • Heike Kamerlingh Onnes discovers Superconductivity. He presented his findings on April 28, 1911.van Delft, D., and Kes, P. The discovery of superconductivity. Physics Today (September 2010), 38–43. |
1937
Mar 5
Age: 25y
| 1937 • The encyclical Divini Redemptoris of Pope Pius XI, critical of communism, is published. |
1998
Jan 1
Age: 86y
| 1998 • Japan launches a probe to Mars, joining the United States and Russia as an outer space-exploring nation. |
2004
May 25
Age: 92y
| 2004 • The largest expansion to date of the European Union takes place, extending the Union by 10 member-states: Poland, Lithuania, Latvia, Estonia, the Czech Republic, Slovakia, Slovenia, Hungary, Malta and Cyprus. |