20th Century Decadian
One world history event per decade for the 20th Century
- First Published
- Sun May 21 2023
- Last Published
- Sun May 21 2023
- Number of cards
- 11
- Number of dates
- 11
- Number of links
- 0
- Link density
- 0
DEFAULT
1905
Einsteins Theory of Special Relativity
not to be confused with Theory of General Relativity (1915)
1914
Start of World War I
1925
Discovery of Tutunkhamun’s Tomb
Discovered by Howard Carter
1939
Start of World War II
1945
Hiroshima destroyed
First use of nuclear weapons in warfare
1953
Polio vaccine created
by Jonas Salk in the USA . Self experimented
1961
Yuri Gagarin first man in space
1975
Microsoft founded
Bill Gates and Paul Allen
1989
Berlin Wall falls
1990
Nelson Mandela released
2000
“Mother of wi-fi” Hedy Lamar dies
Actress and inventor. Developed frequency-hopping spread spectrum technology.