Spouse
1900
| 1900 • Botanist Hugo de Vries rediscovers Mendel's Laws of Heredity. |
1950
Oct 17
Age: 50y
marriageHelen Pearl Leach |
| 1950 • Upon the death of Gustaf V, he is succeeded as King of Sweden by his 68-year-old son Gustaf VI Adolf. |
1961
Mar 27
Age: 61y
| 1961 • Vostok 1: Soviet cosmonaut Yuri Gagarin becomes the first human in space, orbiting the Earth once. |