On April 25, 1901, New York became the first state in the United States to require license plates for automobiles—an unassuming administrative milestone that marked the beginning of a new era in transportation regulation. As motor vehicles began their ascent from elite novelty to…
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On April 24, 1990, a Space Shuttle Discovery mission designated STS-31 changed the course of modern astronomy. From low Earth orbit, it deployed one of the most ambitious scientific instruments ever built: the Hubble Space Telescope. Decades in the making and plagued by delays…
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On April 23, 1635, in the fledgling Puritan settlement of Boston, the foundations of American public education were laid with the establishment of the Boston Latin School. The first public school in what would become the United States, Boston Latin was created not only…
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At precisely noon on April 22, 1889, the American West erupted into motion. The sharp blast of a bugle, followed by the crack of pistols and the thunder of galloping hooves, signaled the beginning of one of the most frenzied land grabs in U.S.…
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In the waning light of April 21, 1836, a force of approximately 900 Texian soldiers led by General Sam Houston launched a surprise assault on a larger, more experienced Mexican army under General Antonio López de Santa Anna. The clash, known as the Battle…
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At around 9:45 p.m. local time on April 20, 2010, a series of explosions shook the Deepwater Horizon, an offshore rig operating 41 miles off Louisiana’s coast. Leased by BP and run by Transocean, the rig was drilling a deep exploratory well in the…
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On April 19, 1956, the world watched in rapt attention as Hollywood royalty became actual royalty. In a union that seemed plucked from the script of a romantic film, American actress Grace Kelly married Prince Rainier III of Monaco, transforming from an Oscar-winning screen…
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On April 18, 1506, under the direction of Pope Julius II, the cornerstone of what would become one of the most iconic churches in Christendom—St. Peter’s Basilica in Vatican City—was laid. The event marked not only the beginning of a monumental architectural project but…
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On April 17, 2014, NASA announced a milestone in the search for life beyond Earth: the confirmation of Kepler-186f, the first Earth-size planet discovered orbiting within the habitable zone of another star. This groundbreaking discovery was made possible by the Kepler Space Telescope, a…
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On April 16, 1457 BC, Pharaoh Thutmose III of Egypt confronted a coalition of Canaanite city-states near the strategic fortress of Megiddo in present-day northern Palestine. More than a turning point in Egypt’s imperial ambitions, the Battle of Megiddo holds distinction as the earliest…
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