13 March It Happened Today

1733  Birth of English chemist Joseph Priestley, credited with discovering oxygen.

1781  Uranus is confirmed as a new planet in the solar system.

1881  Tsar Alexander II is assassinated.

1939  Birth of American singer Neil Sedaka.

1974  Charles De Gaulle airport in Paris is opened.

1996  Sixteen pupils and a teacher are killed by a gunman at their school in Dunblane, Scotland.