The Chernobyl power plant in Ukraine exploded, killing 31 people and spreading contamination across Western Europe.
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Rapper Ice Cube married Kimberly Woodruff.
Astronomer Nicolaus Copernicus made his first observation of Saturn.
The Treaty of London was signed by Italy, Britain, France, and Russia.
The official secret police force of Nazi Germany, the Gestapo, was established.
Great Britain claimed South Georgia Island after Argentina surrendered following the Falklands War.
