Return Today in the History of  Science, Math, Invention & Technology Return

APRIL 26

1785 John James Audubon (Haitian-born Artist and Naturalist) John J. Audubon Birds
1900 Charles Richter (Ohio-born Seismologist: Founder of the Richter Scale) Charles Richter Earthquakes
Deaths
Persons of Historic Significance Who Have Died on This Date
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1877 Minnesota's Governor Declares This a Day of Prayer for Deliverance from Grasshopper Plague Minnesota Religion Grasshoppers Minnesota Historical Society
1881 Frederick Allen Patent's a Life Raft Patents & Trademarks Naval History U.S. Patent and Trademark Office
1892 African-American Inventor, Sarah Boone (Connecticut), Patents an Ironing Board Connecticut Scientists and Mathematicians Patents & Trademarks Patent #473,653 African-American Scientists and Mathematicians African American Registry
1954 Nationwide Testing of Salk Polio Vaccine Begins Jonas Salk Polio March of Dimes
1962 U.S. Ranger 4 Aircraft Impacts on the Far Side of the Moon Space Exploration The Moon NASA BBC
NASA Launches the Ariel 1 Satellite for International Study of the Ionosphere Space Exploration Earth Science NASA
1968 U.S. Conducts 1 Megaton Underground Nuclear Test Nuclear Weapons Geoscience Australia
1986 An Explosion Occurs at Chernobyl Nuclear Power Plant, Ukraine Ukraine  Chernobyl
5.5 Magnitude Earthquake Kills 6 in the Kashmir-India Border Region India Earthquake Death USGS
1990 6.9 Magnitude Earthquake Kills 126 in China's Qinghai Province China Earthquake Death USGS
1993 NASA Launches Space Shuttle Columbia (STS-55) for German Spacelab Mission German Scientists and Mathematicians Space Shuttle Science NASA
2005 The Green Treefrog Is Officially Adopted As Georgia's State Amphibian Georgia Green Treefrog University of Georgia

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