Template:Selected anniversaries/April 25

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  1599: Oliver Cromwell born. He will become a military and political leader and later Lord Protector of the Commonwealth of England, Scotland, and Ireland.

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  2001: Army research laboratories convert modern plowshares into ancient swords. Military contractors call technique "Astonishing breakthrough."

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  2010: Egg Tooth Neighborhood Association organizes benefit for victims of crimes against mathematical constants.

1849 – Felix Klein, German mathematician and academic (d. 1925)

1874 – Guglielmo Marconi, Italian businessman and inventor, developed Marconi's law, Nobel Prize laureate (d. 1937)

1903 – Andrey Kolmogorov, Russian mathematician and academic (d. 1987)

1744 – Anders Celsius, Swedish astronomer, physicist, and mathematician (b. 1701)

1840 – Siméon Denis Poisson, French mathematician and physicist (b. 1781)

1792 – Highwayman Nicolas J. Pelletier becomes the first person executed by guillotine.

1953 – Francis Crick and James Watson publish "Molecular Structure of Nucleic Acids: A Structure for Deoxyribose Nucleic Acid" describing the double helix structure of DNA.

1954 – The first practical solar cell is publicly demonstrated by Bell Telephone Laboratories.

1960 – The United States Navy submarine USS Triton completes the first submerged circumnavigation of the globe.

1961 – Robert Noyce is granted a patent for an integrated circuit.

1983 – Pioneer 10 travels beyond Pluto's orbit.