On This Day in History

August 21

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2019
Science

Brazil Launches Earth Observation Satellite CBERS-4A

Brazil successfully launched the CBERS-4A Earth observation satellite, developed in collaboration with China. The satellite provides real-time data on deforestation and agriculture, supporting sustainable development and environmental monitoring.

๐Ÿ“ China / Brazil (joint program)

Science Environment Space
2017
Science

Eclipse 2017: First Total Solar Eclipse Across U.S. Since 1918

A rare total solar eclipse swept coast-to-coast across the continental United States, captivating millions and becoming one of the most widely viewed astronomical events in American history.

๐Ÿ“ United States (national path)

Science Astronomy Eclipse
1995
Invention

Microsoft Releases Internet Explorer 1.0

Microsoft launched Internet Explorer 1.0 as part of the Windows 95 Plus! pack. This release marked the beginning of the browser wars and the rise of internet access as a mainstream tool globally.

๐Ÿ“ Redmond, Washington, United States

Invention Technology Internet
1992
Politics

Mexico and Vatican Restore Diplomatic Relations

Mexico and the Vatican reestablished full diplomatic relations after more than 130 years of estrangement. This marked a major shift in Mexicoโ€™s secular stance and reflected growing cooperation between church and state.

๐Ÿ“ Mexico City, Mexico / Vatican City

Politics Religion Diplomacy
1991
Politics

Soviet Coup Against Gorbachev Collapses

The hardline coup attempt by Soviet officials to depose Mikhail Gorbachev failed after massive public resistance and the intervention of Boris Yeltsin. The collapse of the coup accelerated the dissolution of the Soviet Union.

๐Ÿ“ Moscow, Soviet Union

We have won freedom. The future belongs to democracy. โ€” Boris Yeltsin
Politics Cold War USSR
1986
Tragedy

El Salvador Earthquake Kills Over 1,200

A powerful earthquake struck El Salvador, killing over 1,200 people and injuring thousands. The disaster devastated the capital, San Salvador, and spurred international aid efforts and seismic rebuilding codes.

๐Ÿ“ San Salvador, El Salvador

Tragedy Earthquake Disaster
1983
Politics

Assassination of Benigno 'Ninoy' Aquino Jr. at Manila Airport

Filipino opposition leader Benigno Aquino Jr. was assassinated upon his return from exile at Manila International Airport. His death triggered massive protests and ultimately led to the fall of Ferdinand Marcosโ€™s dictatorship.

๐Ÿ“ Manila, Philippines

The Filipino is worth dying for. โ€” Ninoy Aquino
Politics Assassination Democracy
1980
Politics

Southern Rhodesia Votes to Become Zimbabwe

Following years of conflict and negotiations, Southern Rhodesia officially voted to adopt the name Zimbabwe and gain recognized independence under majority rule. This marked the end of colonial rule and white-minority governance.

๐Ÿ“ Harare, Zimbabwe

Politics Decolonization Africa
1962
Science

Venus Flyby by Mariner 2 Confirmed by NASA

NASA confirmed that its Mariner 2 spacecraft was on course for a successful flyby of Venus. It would later become the first spacecraft to successfully encounter another planet, providing valuable data on Venus's atmosphere and temperature.

๐Ÿ“ Outer Space / NASA Headquarters, United States

Science Space Exploration NASA
1959
Politics

Hawaii Becomes the 50th U.S. State

Hawaii was officially admitted as the 50th state of the United States, expanding American territory into the Pacific and cementing its geopolitical presence in the region during the Cold War era.

๐Ÿ“ Hawaii, United States

Politics U.S. Expansion
1959
Politics

Iceland Adopts Full Proportional Representation

Iceland implemented constitutional reforms to adopt full proportional representation in its parliamentary elections, reinforcing democratic governance and becoming a model for electoral systems worldwide.

๐Ÿ“ Reykjavรญk, Iceland

Politics Democracy Reform
1958
Politics

U.S. National Aeronautics and Space Act Signed into Law

President Dwight D. Eisenhower signed the National Aeronautics and Space Act, formally establishing NASA to lead space exploration. It laid the foundation for America's space program and the Space Race with the Soviet Union.

๐Ÿ“ Washington, D.C., United States

Politics Science Policy NASA
1958
Invention

Boeing 707 First Commercial Transatlantic Flight Completed

A Boeing 707 operated by Pan Am completed the first successful commercial transatlantic jet flight, marking a new era in global air travel and modernizing long-distance transportation for passengers worldwide.

๐Ÿ“ New York to Paris (Transatlantic)

Invention Aviation Transport
1954
Politics

United States Outlaws the Communist Party

The U.S. Communist Control Act was signed into law, effectively banning the Communist Party and labeling it a threat to American democracy. The act reflected Cold War-era fears and significantly curtailed political freedoms during McCarthyism.

๐Ÿ“ United States

Politics Cold War Civil Liberties
1947
Culture

Kenya Hosts First Pan-African Congress on Prehistory

Kenya hosted the First Pan-African Congress on Prehistory in Nairobi, gathering global archaeologists and African scholars to discuss the continent's historical legacy and origins of early human civilization.

๐Ÿ“ Nairobi, Kenya

Culture Archaeology Africa
1942
War

Battle of Guadalcanal: U.S. Forces Secure Henderson Field

During the pivotal Battle of Guadalcanal in World War II, U.S. Marines successfully defended Henderson Field against Japanese attacks. The victory was crucial in establishing Allied dominance in the Pacific Theater.

๐Ÿ“ Guadalcanal, Solomon Islands

War WWII Pacific
1907
Politics

First Self-Governing Assembly of the Philippines Convenes

The Philippine Assembly, the first elected legislative body under U.S. rule, convened in Manila, representing a step toward eventual independence and a significant moment in Southeast Asian political development.

๐Ÿ“ Manila, Philippines

Politics Colonialism
1858
Politics

Lincolnโ€“Douglas Debates Begin

The first of seven Lincolnโ€“Douglas debates took place in Illinois, focusing on slavery and state rights. The debates propelled Abraham Lincoln into national prominence and became defining moments in American political rhetoric.

๐Ÿ“ Ottawa, Illinois, United States

A house divided against itself cannot stand. โ€” Abraham Lincoln
Politics Debates Slavery
1831
Politics

Nat Turner Leads Slave Rebellion in Virginia

Nat Turner, an enslaved preacher, led a violent rebellion in Virginia that resulted in the deaths of over 50 white people. The revolt triggered severe retaliation and stricter slave laws in the South, intensifying the debate over slavery in America.

๐Ÿ“ Southampton County, Virginia, United States

I heard a loud voice from heaven saying unto me, 'Slay my enemies.' โ€” Nat Turner
Politics Slavery Civil Rights
1830
Politics

King William IV Ascends to British Throne

William IV officially became King of the United Kingdom following the death of his brother George IV. His reign witnessed political reforms, including the passage of the Reform Act 1832 which expanded the electorate.

๐Ÿ“ London, United Kingdom

Politics Monarchy Reform