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MARCH 31

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César Chávez Day
(Commemoration of the birth date of César Chávez: 03/31/1927)
César Chávez Farming & Agriculture Labor Latin-American Studies César Chávez Foundation
Bunsen Burner Day
(Commemorates the birth date of Robert Wilhelm Bunsen: 03/31/1811)
Robert Wilhelm Bunsen Inventors & Inventions
1811 Robert Wilhelm Eberhard von Bunsen (German Pioneer in Chemical Spectroscopy Who Discovered Rubidium and Cesium) Robert Wilhelm Eberhard von Bunsen Science Rubidium Cesium
1890 Sir Lawrence Bragg (Australian Physicist Awarded the 1915 Nobel Laureate for Physics) Australian Scientists and Mathematicians Physics 1915 Nobel Laureate for Physics
Deaths
Persons of Historic Significance Who Have Died on This Date
1945 Hans Fischer (German Chemist; 1930 Nobel Laureate for Chemistry) German Scientists and Mathematicians Chemistry 1930 Nobel Laureate for Chemistry IntelliHealth
2002 Henry J. Kasperowicz (New Jersey-born Inventor of the Red-Green-Blue Three-color Television Tube) New Jersey Scientists & Inventors Inventors and Inventions Television Technology and Society
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1820 The First Steamboat Ascends the Arkansas River to Arkansas Post Arkansas Post Rivers Steamboarts Historic Firsts Arkansas History Commission
1880 Wabash, Indiana Is the First Town in the World to Light Its Streets with Electricity Wabash, Indiana Electricity Historic Firsts Wabash Carnegie Public Library
1889 Seattle, Washington's First Electric Trolley Line Begins Operation Seattle, Washington Electricity Historic Firsts History Link
1918 Daylight Savings Time Is First Observed Nationwide as a War-Time Measure to Save Energy World War I Time Historic Firsts University of Georgia
1931 5.6 Magnitude Earthquake Kills 2,450 in Nicaragua Nicaragua Earthquake Death USGS
1933 In Ohio, Cincinnati's Union Railroad Terminal Is Completed Cincinnati, Ohio Railroad Architecture Cincinnati Museum Center at Union Terminal Ohio Historical Society
1966 Soviets Launch Luna 10 Lunar Orbiter from Space Platform Russian Space Program Space Exploration Lunar Exploration NASA
1971 NASA Launches ISIS 2 Ionospheric Observatory Space Exploration Earth and Enivronmental Science NASA
1972 British Protesters Begin 4-day March Against Nuclear Weapons Great Britain Nuclear Weapons BBC
1973 A 77-day Mississippi River Flood Reaches Peak Level in St. Louis St. Louis, Missouri Mississippi River Flooding History Channel
1981 Ananda Chakrabarty Patents a New Single Cell Life Form Biology Patents and Trademarks Cells USPTO
1983 5.5 Magnitude Earthquake Kills 250-350 People in Colombia Colombia Earthquake Death USGS
1986 6 People Treated for Minor Injuries as 5.5 Magnitude Earthquake Hits Central California California Earthquake USGS

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