- 1599 Oliver Cromwell born; led the Parliamentary army to success, replaced the English monarchy with republican rule (the Commonwealth of England). A year after his death, Parliament restored the monarchy.
- 1849 German mathematician Felix Klein born; created the Erlanger Programm; created the Klein Bottle.
- 1873 French-Canadian microbiologist Félix d' Hérelle born; discovered bacteriophages, viruses that eat bacteria.
- 1874 Italian physicist Guglielmo Marconi born; invented the radio.
- 1900 Austrian-American physicist Wolfgang Pauli born; 1945 Nobel, for the Pauli exclusion principle (nominated by Einstein); successfully proposed a "spin number" to extend the number of facets of quantum state.
- 1903 Russian mathematician Andrey Nikolayevich Kolmogorov born; father of stationary stochastic processes; solved Hilbert's thirteenth problem; a founder of algorithmic complexity theory.
- 1953 Francis Crick and James Watson publish their discovery of the structure of DNA.
- 1990 The U.S. deploys the Hubble Space Telescope, inaugurating a new era in astronomy.
Friday, April 25, 2008
Today in History: April 25
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