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APRIL 22

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Earth Day
(Since 1970)
Earth Day Earth Day Network
1891 Harold Jeffreys (English Geophysicist, Astronomer) English Scentists & Mathematicians Earth Science Astronomy St. Andrews University USGS
1904 J. Robert Oppenheimer (New York City-born Nuclear Physicist Who Headed Development of the World's First Atomic Bomb) J. Robert Oppenheimer Physics Nuclear Weapons World War II
Deaths
Persons of Historic Significance Who Have Died on This Date
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1715 In England, a Solar Eclipse Occurs as Predicted by Reverend John Flamsteed, the First Astronomer Royal John Flamsteed Solar Eclipse Space and Astronomy Greenwich Guide
1880 The Atchison, Topeka & Santa Fe Railway Reaches Albuquerque, New Mexico Albuquerque, New Mexico Railroads New Mexico Magazine
1884 John Golding Patents a Process for Metallic Screening Metals Inventors & Inventions Patents U.S. Patent and Trademark Office
Thomas Stevens Begins First Around-the-World Bicycle Trip from Oakland Pier California Bicycling Earth Bicycle Museum of America
1915 Germans Make First Use of Poison Chlorine Gas at the Second Battle of Ypres Germany World War I Chlorine Historic Firsts Brigham Young University History Channel Center for the Study of Technology and Society
1934 The U.S. Navy Dirigible Macon Arrives in Miami, Florida Ending a Record Setting 54-hour Flight from Sunnyvale, California Miami, Florida Sunnyvale, California Aviation History Florida Historical Association
1952 An Atomic Test Conducted in Nevada is the First Nuclear Explosion Shown on Live Network Television Nevada Nuclear Weapons Television Historic Firsts New York Times
1970 The First Earth Day Is Observed Earth Day Historic Firsts Earth Day Network The History Channel Wisconsin Historical Society
1971 Soviets Launch Soyuz 10 for Docking Mission to Salyut 1 Soviet Space Program Space Exploration NASA
1972 NASA Astronauts Take the Rover for a 7 Hour 23 Minute Lunar Ride Astronauts The Moon NASA
1976 NASA Launches NATO 3-A, the First in a Series of NATO Defense-Related Communications Satellites Space Exploration NATO Historic Firsts NASA
1991 In Costa Rica, a 7.6 Magnitude Earthquake Leaves 47 People Killed, 109 Injured and 7,439 Homeless Costa Rica Earthquake Death USGS
1992 A Gas Leak Causes Dozens of Sewer Explosions in Guadalajara, Mexico, Killing More Than 200 People and Damaging 1,000 Buildings Guadalajara, Mexico Gas Laws The History Channel
1994 BÝrge Ousland First Person to Reach the North Pole Alone Arctic Norway Official Website
Physicists at FermiLab Present Evidence for Production of Top Quarks from Collisions Between Protons and Antiprotons Subatomic Particles Physics FermiLab

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