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| File:Michel de Montaigne.jpg|link=Michel de Montaigne (nonfiction)|1533: Philosopher and author [[Michel de Montaigne (nonfiction)|Michel de Montaigne]] born. He will be one of the most significant philosophers of the French Renaissance, known for popularizing the essay as a literary genre. | | File:Michel de Montaigne.jpg|link=Michel de Montaigne (nonfiction)|1533: Philosopher and author [[Michel de Montaigne (nonfiction)|Michel de Montaigne]] born. He will be one of the most significant philosophers of the French Renaissance, known for popularizing the essay as a literary genre. |
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| ||1535 – Cornelius Gemma, Dutch astronomer and astrologer (d. 1578)
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| File:Jost Bürgi.jpg|link=Jost Bürgi (nonfiction)|1552: Clockmaker and mathematician [[Jost Bürgi (nonfiction)|Jost Bürgi]] born. He will be recognized during his own lifetime as one of the most excellent mechanical engineers of his generation. | | File:Jost Bürgi.jpg|link=Jost Bürgi (nonfiction)|1552: Clockmaker and mathematician [[Jost Bürgi (nonfiction)|Jost Bürgi]] born. He will be recognized during his own lifetime as one of the most excellent mechanical engineers of his generation. |
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| ||1675 – Guillaume Delisle, French cartographer (d. 1726)
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| ||René Antoine Ferchault de Réaumur (b. 28 February 1683) was a French entomologist and writer who contributed to many different fields, especially the study of insects. He introduced the Réaumur temperature scale.
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| File:John Arbuthnot.jpg|link=John Arbuthnot (nonfiction)|1691: Physician, satirist, and polymath [[John Arbuthnot (nonfiction)|John Arbuthnot]] uses [[Gnomon algorithm]] techniques to rewrite existing manuscripts using satirical premises.
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| ||1704 – Louis Godin, French astronomer and academic (d. 1760)
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| ||Alexandre-Théophile Vandermonde (b. 28 February 1735) was a French mathematician, musician and chemist who worked with Bézout and Lavoisier; his name is now principally associated with determinant theory in mathematics.
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| ||Willem Jacob 's Gravesande (d. 28 February 1742) was a Dutch mathematician and natural philosopher, chiefly remembered for developing experimental demonstrations of the laws of classical mechanics. As professor of mathematics, astronomy, and philosophy at Leiden University, he helped to propagate Isaac Newton's ideas in Continental Europe.
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| ||1792 – Karl Ernst von Baer, German biologist, meteorologist, and geographer (d. 1876)
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| ||Joseph Thomas Clover (b. 28 February 1825) was an English doctor and pioneer of anaesthesia. He invented a variety of pieces of apparatus to deliver anaesthetics including ether and chloroform safely and controllably. By 1871 he had administered anaesthetics 13,000 times without a fatality.
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| ||1844 – A gun on USS Princeton explodes while the boat is on a Potomac River cruise, killing six people, including two United States Cabinet members.
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| ||1849 – Regular steamboat service from the west to the east coast of the United States begins with the arrival of the SS California in San Francisco Bay, four months 22 days after leaving New York Harbor.
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| ||Manuel John Johnson, FRS (d. 28 February 1859) was a British astronomer.
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| ||1878 – Pierre Fatou, French mathematician and astronomer (d. 1929). Pic.
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| ||1885 – The American Telephone and Telegraph Company is incorporated in New York as the subsidiary of American Bell Telephone. (American Bell would later merge with its subsidiary.)
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| ||1900 – Wolf Hirth, German pilot and engineer, co-founded Schempp-Hirth (d. 1959)
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| File:Linus Pauling.jpg|link=Linus Pauling (nonfiction)|1901: Chemist, biochemist, peace activist, author, and educator [[Linus Pauling (nonfiction)|Linus Pauling]] born. | | File:Linus Pauling.jpg|link=Linus Pauling (nonfiction)|1901: Chemist, biochemist, peace activist, author, and educator [[Linus Pauling (nonfiction)|Linus Pauling]] born. |
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| ||1906 – Bugsy Siegel, American gangster (d. 1947)
| | File:Rhizolith Group.jpg|link=Rhizolith Group|1967: Modern dance geology company '''[[Rhizolith Group]]''' debuts a new work, "Coriolis Force and Particulate Deposit Patterns in Paleoglacial Sedimentary Deposits". |
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| ||1907 – Milton Caniff, American cartoonist (d. 1988)
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| ||1915 – Peter Medawar, Brazilian-English biologist and immunologist, Nobel Prize laureate (d. 1987)
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| |File:Exponential-growth-diagram.svg|link=Crimes against mathematical constants|1919: New class of [[Crimes against mathematical constants]] "exploit vulnerabilities in Leap Year algorithms."
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| ||1921 – Pierre Clostermann, French pilot, engineer, and author (d. 2006)
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| ||1925 – The Charlevoix-Kamouraska earthquake strikes northeastern North America.
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| ||1929 – Clemens von Pirquet, Austrian physician and immunologist (b. 1874)
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| ||1932 – Guillaume Bigourdan, French astronomer and academic (b. 1851)
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| ||1933 – Gleichschaltung: The Reichstag Fire Decree is passed in Germany a day after the Reichstag fire.
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| ||1935 – DuPont scientist Wallace Carothers invents nylon.
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| ||1936 – Charles Nicolle, French biologist and academic, Nobel Prize laureate (b. 1866)
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| ||1939 – The erroneous word "dord" is discovered in the Webster's New International Dictionary, Second Edition, prompting an investigation.
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| File:Der Reichsspritzenmeister.jpg|link=Der Reichsspritzenmeister|1944: [[Der Reichsspritzenmeister]] develops new drug to stimulate [[crimes against mathematical constants]].
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| ||1953 – James Watson and Francis Crick announce to friends that they have determined the chemical structure of DNA; the formal announcement takes place on April 25 following publication in April's Nature (pub. April 2).
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| ||1954 – The first color television sets using the NTSC standard are offered for sale to the general public.
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| ||1959 – Discoverer 1, an American spy satellite that is the first object intended to achieve a polar orbit, is launched but fails to achieve orbit.
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| ||Teiji Takagi (d. February 28, 1960) was a Japanese mathematician, best known for proving the Takagi existence theorem in class field theory. The Blancmange curve, the graph of a nowhere-differentiable but uniformly continuous function, is also called the Takagi curve after his work on it.
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| ||1993 – The Bureau of Alcohol, Tobacco and Firearms agents raid the Branch Davidian church in Waco, Texas with a warrant to arrest the group's leader David Koresh. Four ATF agents and six Davidians die in the initial raid, starting a 51-day standoff.
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| ||1997 – GRB 970228, a highly luminous flash of gamma rays, strikes the Earth for 80 seconds, providing early evidence that gamma-ray bursts occur well beyond the Milky Way.
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| ||1998 – First flight of RQ-4 Global Hawk, the first unmanned aerial vehicle certified to file its own flight plans and fly regularly in U.S. civilian airspace.
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| ||2006 – Owen Chamberlain, American physicist and academic, Nobel Prize laureate (b. 1920)
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| ||2013 – Donald A. Glaser, American physicist and biologist, Nobel Prize laureate (b. 1926)
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| ||2014 – Lee Lorch, American mathematician and activist (b. 1915)
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| File:Burglars excerpt 1.jpg|link=Burglars (Gnomon Chronicles)|2017: Steganographic analysis of [[Burglars (Gnomon Chronicles)|excerpt from "Burglars"]] unexpected reveals "at least half a gigabyte of encrypted data, probably related to the [[ENIAC (SETI)|ENIAC program]]".
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