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NASA's Kepler space observatory confirms the discovery of the first Earth-size planet in the habitable zone of another star.
An explosion at a fertilizer plant in the city of West, Texas, kills 15 people and injures 160 others.
A Palestinian suicide bomber detonates an explosive device in a Tel Aviv restaurant, killing 11 people and injuring 70.
Patriation of the Canadian constitution in Ottawa by Proclamation of Elizabeth II, Queen of Canada.
Mir Akbar Khyber is assassinated, provoking a communist coup d'état in Afghanistan.
The Cambodian Civil War ends. The Khmer Rouge captures the capital Phnom Penh and Cambodian government forces surrender.
Apollo program: The ill-fated Apollo 13 spacecraft returns to Earth safely.
Communist Party of Czechoslovakia chairman Alexander Dubček is deposed.
Bay of Pigs Invasion: A group of Cuban exiles financed and trained by the CIA lands at the Bay of Pigs in Cuba with the aim of ousting Fidel Castro.
The Peak District becomes the United Kingdom's first National Park.
At midnight 26 Irish counties officially leave the British Commonwealth. A 21-gun salute on O'Connell Bridge, Dublin, ushers in the Republic of Ireland.
Forces of the Communist-controlled Greek People's Liberation Army attack the smaller National and Social Liberation resistance group, which surrenders. Its leader Dimitrios Psarros is murdered.
French prisoner of war General Henri Giraud escapes from his castle prison in Königstein Fortress.
World War II: The Kingdom of Yugoslavia surrenders to Germany.
Russian troops open fire on striking goldfield workers in northeast Siberia, killing at least 150.
The Ellis Island immigration center processes 11,747 people, more than on any other day.
The Supreme Court of the United States decides Lochner v. New York, which holds that the "right to free contract" is implicit in the due process clause of the Fourteenth Amendment to the United States Constitution.
The Treaty of Shimonoseki between China and Japan is signed. This marks the end of the First Sino-Japanese War, and the defeated Qing Empire is forced to renounce its claims on Korea and to concede the southern portion of the Fengtien province, Taiwan and the Pescadores Islands to Japan.
American Civil War: The Battle of Plymouth begins: Confederate forces attack Plymouth, North Carolina.
American Civil War: Grierson's Raid begins: Troops under Union Army Colonel Benjamin Grierson attack central Mississippi.
The state of Virginia's secession convention votes to secede from the United States, becoming the 8th state to join the Confederate States of America.
Citizens of Verona begin an unsuccessful eight-day rebellion against the French occupying forces.
Sir Ralph Abercromby attacks San Juan, Puerto Rico, in what would be one of the largest invasions of the Spanish territories in the Americas.
Trial of Martin Luther over his teachings begins during the assembly of the Diet of Worms. Initially intimidated, he asks for time to reflect before answering and is given a stay of one day.
Spain and Christopher Columbus sign the Capitulations of Santa Fe for his voyage to Asia to acquire spices.
Geoffrey Chaucer tells The Canterbury Tales for the first time at the court of Richard II. Chaucer scholars have also identified this date (in 1387) as the start of the book's pilgrimage to Canterbury.
Kaunas Castle falls to the Teutonic Order after a month-long siege.
The rule of the Bavand dynasty in Mazandaran is brought to an end by the murder of Hasan II.
Harald III of Denmark dies and is succeeded by Canute IV, who would later be the first Dane to be canonized.
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