September 12: on this day in history

Historical events

1. 490 BCThe Athenians and Plataeans defeated the Persian army at the Battle of Marathon.
2. 1848Switzerland acquired its present federal structure under its new constitution.
3. 1933Physicist Leó Szilárd conceived the nuclear chain reaction, the key to atomic energy.
4. 1958Jack Kilby demonstrated the first working integrated circuit, the ancestor of modern computer chips.
5. 1990The two German states and the four major powers signed a treaty in Moscow paving the way for German reunification.

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