Apr 22, 1970
The first Earth Day. Earth Day is an event to increase public awareness of the world's environmental problems, which is celebrated in the United States for the first time. Millions of Americans, including students from thousands of colleges and universities, participated in rallies, marches, and educational programs. Earth Day was the brainchild of Senator Gaylord Nelson of Wisconsin, a staunch environmentalist who hoped to provide unity to the grassroots environmental movement and increase ecological awareness.
Apr 23, 1564
William Shakespeare born. According to tradition, the great English dramatist and poet William Shakespeare is born in Stratford-on-Avon on April 23, 1564. It is impossible to be certain the exact day on which he was born, but church records show that he was baptized on April 26, and three days was a customary amount of time to wait before baptizing a newborn. Shakespeare's date of death is conclusively known, however: it was April 23, 1616. He was 52 years old and had retired to Stratford three years before.
Apr 24, 1916
Easter Rebellion begins. On this day in 1916, on Easter Monday in Dublin, the Irish Republican Brotherhood, a secret organization of Irish nationalists led by Patrick Pearse, launches the so-called Easter Rebellion, an armed uprising against British rule. Assisted by militant Irish socialists under James Connolly, Pearse and his fellow Republicans rioted and attacked British provincial government headquarters across Dublin and seized the Irish capital's General Post Office. Following these successes, they proclaimed the independence of Ireland, which had been under the repressive thumb of the United Kingdom for centuries, and by the next morning were in control of much of the city. Later that day, however, British authorities launched a counteroffensive, and by April 29 the uprising had been crushed. Nevertheless, the Easter Rebellion is considered a significant marker on the road to establishing an independent Irish republic.
Apr 25, 1983
Andropov writes to U.S. student. On this day in 1983, the Soviet Union releases a letter that Russian leader Yuri Andropov wrote to Samantha Smith, an American fifth-grader from Manchester, Maine, inviting her to visit his country. Andropov's letter came in response to a note Smith had sent him in December 1982, asking if the Soviets were planning to start a nuclear war. At the time, the United States and Soviet Union were Cold War enemies. President Ronald Reagan, a passionate anti-communist, had dubbed the Soviet Union the "evil empire" and called for massive increases in U.S. defense spending to meet the perceived Soviet threat. In his public relations duel with Reagan, known as the "Great Communicator," Andropov, who had succeeded longtime Soviet leader Leonid Brezhnev in 1982, assumed a folksy, almost grandfatherly approach that was incongruous with the negative image most Americans had of the Soviets.
Apr 26, 1954
Polio vaccine trials begin. On this day in 1954, the Salk polio vaccine field trials, involving 1.8 million children, begin at the Franklin Sherman Elementary School in McLean, Virginia. Children in the United States, Canada and Finland participated in the trials, which used for the first time the now-standard double-blind method, whereby neither the patient nor attending doctor knew if the inoculation was the vaccine or a placebo. On April 12, 1955, researchers announced the vaccine was safe and effective and it quickly became a standard part of childhood immunizations in America. In the ensuing decades, polio vaccines would all but wipe out the highly contagious disease in the Western Hemisphere.
Apr 27, 4977 B.C.
Universe is created, according to Kepler. On this day in 4977 B.C., the universe is created, according to German mathematician and astronomer Johannes Kepler, considered a founder of modern science. Kepler is best known for his theories explaining the motion of planets.
Kepler was born on December 27, 1571, in Weil der Stadt, Germany. As a university student, he studied the Polish astronomer Nicolaus Copernicus' theories of planetary ordering. Copernicus (1473-1543) believed that the sun, not the earth, was the center of the solar system, a theory that contradicted the prevailing view of the era that the sun revolved around the earth.
Apr 28, 1945
Benito Mussolini executed. On this day in 1945, "Il Duce," Benito Mussolini, and his mistress, Clara Petacci, are shot by Italian partisans who had captured the couple as they attempted to flee to Switzerland. The 61-year-old deposed former dictator of Italy was established by his German allies as the figurehead of a puppet government in northern Italy during the German occupation toward the close of the war. As the Allies fought their way up the Italian peninsula, defeat of the Axis powers all but certain, Mussolini considered his options. Not wanting to fall into the hands of either the British or the Americans, and knowing that the communist partisans, who had been fighting the remnants of roving Italian fascist soldiers and thugs in the north, would try him as a war criminal, he settled on escape to a neutral country.