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National Radio Day
(Commemoration of the first commercial radio broadcast: 08/20/1920)
1779 Jöns Jakob Berzelius (Swedish Chemist) Jöns Jakob Berzelius Chemistry Chemical Elements
1908 Kingsley Davis (Texas-born Sociologist, Demographer Who Coined the Terms, Zero Population Growth and Population Explosion) Texas Scientists & Mathematicians Demography
Valentin Glushko (Soviet Rocket Scientist) Valentin Glushko Space Exploration
1913 Roger W. Sperry (Connecticut-born Physicist; 1981 Nobel Laureate for Medicine & Physiology) Roger W. Sperry The Brain 1981 Nobel Laureate: Medicine & Physiology
Persons of Historic Significance Who Have Died on This Date
1872 Susan Dimock Becomes Resident Physician at New England Hospital for Women and Children Masachusetts Medicine Women Child Health Care Massachusetts Foundation for the Humanities
1886 Indianola, Texas Suffers Through Second Day of a Two-day Hurricane Texas Hurricanes Texas State Historical Association
1920 The Detroit News Completes the Installation of a Radio Transmitter for Commercial Radio Broadcast (WWJ) Detroit Media The Detroit News Radio History of Technology Historic Firsts WWJ Early Radio History
1929 The BBC Airs Its First Experimental Television Broadcast Great Britain Television History of Technology BBC
1930 Philo Farnsworth Patents a Television Philo T. Farnsworth Television History of Technology Inventors & Inventions Patents & Trademarks USPTO
1942 Glenn T. Seaborg and Colleagues Isolate the First Visible Amounts of Plutonium at the University of Chicago University of Chicago Glenn T. Seaborg Plutonium Nuclear Weapons Historic Firsts Lawrence Berkeley National Laboratory
1953 Soviet Union Publicly Acknowledges Testing a Hydrogen Bomb Soviet Union Nuclear Weapons The Cold War New York Times
1960 Soviets Are the First to Send Dogs into Space and Return Them Alive Russian Space Program Space Exploration Dogs Historic Firsts Technology and Society
1975 NASA Launches Viking 1 for a Mars Landing Space Exploration Mars History Channel NASA
1977 NASA Launches Voyager 2 Satellite to Probe the Solar System and Deep Space Carrying Messages from Earth Space Exploration Solar System Writer's Almanac Technology and Society NASA
1985 Original Xerox 914 Copier Is Donated to the Smithsonian Institution Inventors & Inventions History of Technology Smithsonian Institution
1988 6.8 Magnitude Earthquake Kills 721 People in the Nepal-India Border Region Nepal India Earthquake Death USGS
1989 6.1 Magnitude Earthquake Kills 2 People in Ethiopia Ethiopia Earthquake Death USGS