The past leaves a trace.

The Olkiluoto Nuclear Power Plant began operations in Eurajoki, Satakunta, Finland.

The Olkiluoto Nuclear Power Plant began operations in Eurajoki, Satakunta, Finland.

The Outer Space Treaty comes into force.

The Outer Space Treaty comes into force.

The Wuchang Uprising begins

The Wuchang Uprising begins on October 10, 1911, becoming a major turning point in the revolution against the Qing dynasty.

Soldiers of the New Army in Wuchang rebelled after an accidental explosion exposed revolutionary activity. They attacked the regional government and established control of the city, encouraging other provinces to break with Qing rule.

The uprising helped set in motion the 1911 Revolution. The wider movement led to the end of the Qing dynasty and the establishment of the Republic of China in 1912; October 10 is remembered as the uprising's starting date.

Triton, the largest moon of the planet Neptune, is discovered by English astronomer William Lassell.

Triton, the largest moon of the planet Neptune, is discovered by English astronomer William Lassell.

Birth of Isabella II of Spain

Born: Isabella II of Spain (died 1904).

Death of Habib ibn Madhahir

Died: Habib ibn Madhahir.

The second church structure of Hagia Sophia was inaugurated.

The second church structure of Hagia Sophia was inaugurated.

The Roman general Germanicus dies near Antioch. He was convinced that the mysterious illness that ended in…

The Roman general Germanicus dies near Antioch. He was convinced that the mysterious illness that ended in his death was a result of poisoning by the Syrian governor Gnaeus Calpurnius Piso, whom he had ordered to leave the province.