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

OCTOBER 20

1943 John Erickson (Texas-born Children's Author) Texas Authors and Illustrators Young-adult Authors Dogs
Barbara Bash (Illinois-born Children's Author, Illustrator) Ilinois Authors and Illustrators Primary Children's Authors American Artists Science
1891 James Chadwick (English Physicist: 1935 Nobel Laureate for Physics) James Chadwick Subatomic Particles 1935 Nobel Laureate in Physics
1930 Samuel Kountz (Arkansas-born African-American Physician) Arkansas Scientists & Mathematicians Medicine African-American Scientists & Mathematicians
1942 Christiane Nüsslein-Volhard (German-born 1995 Nobel Laureate in Physiology or Medicine) Christiane Nüsslein-Volhard Genetics 1995 Nobel Laureate in Physiology or Medicine
Deaths
Persons of Historic Significance Who Have Died on This Date
1984 Paul A.M. Dirac (English-born 1933 Nobel Laureate for Physics) Paul Dirac Physics 1933 Nobel Laureate for Physics
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1695 Popocatepetl Volcano Near Mexico City Erupts for First Time in 30 Years Mexico Volcano Mexico Connect
1870 Earthquake between Montreal and Quebec, Canada Felt over 1M Square Mile Area Canada Earthquake USGS
1921 Tampa Bay-Tarpon Springs Area Devastated by 100 mph Hurricane Florida Hurricane Florida State Historical Society
1969 U.S. Department of Interior Designates Georgia's Wassaw Island a National Wildlife Refuge Georgia Official Website University of Georgia
1970 Norman Borlaug Selected Nobel Laureate for Peace for Increasing 3rd-World Food Yields Iowa Biochemistry Farming & Agriculture 1970 Nobel Peace Prize
1983 Meter Redefined as Distance Light Travels in a Vacuum in 1/299,792,458s Standards of Measurement Light National Institute of Standards
1984 Monterey Bay Aquarium Opens in California Monterey, California Aquariums and Aquatic Parks Aquariums and Aquatic Parks
1986 8.3 Magnitude South Pacific Earthquake Rocks New Zealand New Zealand Earthquake USGS
1991 7.0 Magnitude Earthquake Kills 2,000+ in Northern India India Earthquake USGS

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