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World Malaria Day
(First Declared at the 2000 African Summit on Malaria to be Observed Annually on April 25; Adopted in 2007 as a Global Observation by the World Health Organization)
Malaria Malaria Consortium (pdf)
United States: National DNA Day
(Commemoration of the 2003 Completion of the Human Genome Project and the 1953 Discovery of DNA's Double Helix)
United States National DNA Day National Human Genome Research Institute
1507 Martin Waldseemuller (German Scholar Credited with Naming America) Germany Maps World History
1853 Marc Isambard Brunel (French Inventor, Engineer: Built First Underwater Tunnel) French Scientists and Mathematicians Inventors and Inventions Technology and Society
1853 John Frank Stevens (Maine-born Chief Civil Engineer of the Panama Canal) Maine Scientists and Mathematicians Railroads Panama Canal
1874 Guglielmo Marconi (Italian Inventor of the Wireless Telegraph) Guglielmo Marconi Inventors and Inventions Wireless Telegraph 1909 Nobel Laureate for Physics
1900 Wolfgang Pauli (Austrian Physicist, 1945 Nobel Laureate for Physics) Wolfgang Pauli Electrons 1945 Nobel Laureate for Physics
1942 Stuart J. Murphy (Connecticut-born Children's Author of the MathStart Series) Connecticut Authors Mathematics Official Website
Persons of Historic Significance Who Have Died on This Date
1792 Guillotine Is First Used for an Execution France Capital Punishment University of San Diego Technology and Society
1873 Eli Janney Receives Patent for Railroad Car Coupling Railroads Patents & Trademarks National Archives and Records Administration
1928 American Morris Frank Arrives in Switzerland to Train with First Seeing Eye Dog Blindness Dogs Historic Firsts Seeing Eye, Inc.
1953 James Watson and Francis Crick Propose a Structure for DNA James Watson DNA 1962 Nobel Prize for Physiology and Medicine BBC
1954 Bell Labs Announces First Solar Battery Energy Sun Historic Firsts IEEE
1959 The St. Lawrence Seaway Opens to Shipping Canada United States Ships Canals & Waterways Canadian Broadcasting Corporation
1961 U.S. Launches Atlas Rocket to Test Mercury Spacecraft Systems Space Exploration NASA
Ernest Hemingway Is Hospitalized at the Mayo Clinic After Two Attempts at Suicide Ernest Hemingway American Authors Mental Health American Collection
1962 NASA Launches SA-2 Rocket to Test Effects of Release of Water on Radio Transmissions and Weather Space Exploration Water Radio Weather NASA
1971 Soviet Soyuz 10 Returns to Earth Earlier Than Expected After Docking with Salyut 1 Space Station Soviet Space Program Space Exploration Television News Archive
1989 6.8 Magnitude Earthquake Near the Coast of Guerrero, Mexico Kills 3 Mexico Earthquake Death USGS
1990 Space Shuttle Discovery Astronauts Deploy the Hubble Telescope Space Shuttle Hubble Telescope NASA The History Channel
1992 7.1 Magnitude Earthquake Injures 98 in Southwestern Humboldt County, California Humboldt County, California Earthquake Humboldt County, California USGS

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