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Monthly Archives: April 2026
The Birth of Earth Day (April 22, 1970)
The Event: On April 22, 1970, the very first Earth Day was celebrated across the United States. Conceived by Senator Gaylord Nelson of Wisconsin and organized by activist Denis Hayes, the event aimed to promote ecology and raise awareness about … Continue reading
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The Founding of Rome (April 21, 753 BC)
The Founding of Rome (April 21, 753 BC) The Event: According to Roman mythology, the foundation of the eternal city occurred on April 21, 753 BC. This date marks the traditional founding of Rome by Romulus, who, with his twin … Continue reading
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The Isolation of Radium (April 20, 1902)
The Isolation of Radium (April 20, 1902) The Event: On April 20, 1902, in a leaky, makeshift laboratory in Paris, Marie and Pierre Curie successfully isolated radioactive radium salts from pitchblende. This watercolor rendering visualizes the breakthrough moment on rough … Continue reading
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The Battles of Lexington and Concord (April 19, 1775)
An oil painting rendering of “the shot heard round the world” at Lexington Green, April 19, 1775. The Event On the morning of April 19, 1775, the American Revolutionary War began with the Battles of Lexington and Concord. British troops … Continue reading
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The Great San Francisco Earthquake (April 18, 1906)
On the morning of April 18, 1906, at approximately 5:12 a.m., a powerful, magnitude 7.9 earthquake, centered near San Francisco along the San Andreas Fault, struck the coast of Northern California. While the violent initial shaking caused significant damage—flattening Victorian … Continue reading
The Safe Return of Apollo 13 (April 17, 1970)
The Event: On April 17, 1970, the world breathed a collective sigh of relief as the Apollo 13 mission concluded with a successful splashdown in the South Pacific Ocean. What was intended to be the third lunar landing turned … Continue reading
The Battle of Culloden (April 16, 1746)
The Event: On April 16, 1746, the Battle of Culloden took place on Drummossie Moor near Inverness, Scotland. It was the final confrontation of the Jacobite Rising of 1745 and the last pitched battle fought on British soil. The … Continue reading
The Sinking of the RMS Titanic (April 15, 1912)
The Event: In the early hours of April 15, 1912, the RMS Titanic, the largest and most luxurious ocean liner of its time, sank in the North Atlantic Ocean after striking an iceberg during its maiden voyage. Despite being … Continue reading
The Assassination of Abraham Lincoln (April 14, 1865)
The Event: On the evening of April 14, 1865—just days after the surrender of Confederate General Robert E. Lee—President Abraham Lincoln was assassinated at Ford’s Theatre in Washington, D.C. While watching the play Our American Cousin, Lincoln was shot … Continue reading