Portal:History of science/Selected anniversaries/April 25
- 1710 - Birth of James Ferguson, Scottish astronomer (d. 1776)
- 1744 - Death of Anders Celsius, Swedish astronomer (b. 1701)
- 1770 - Death of Jean-Antoine Nollet, French abbot and physicist (b. 1700)
- 1840 - Death of Siméon-Denis Poisson, French mathematician (b. 1781)
- 1849 - Birth of Felix Klein, German mathematician (d. 1925)
- 1874 - Birth of Guglielmo Marconi, Italian inventor, recipient of the Nobel Prize in Physics (d. 1937)
- 1900 - Birth of Wolfgang Ernst Pauli, Austrian-born physicist, Nobel Prize laureate (d. 1958)
- 1903 - Birth of Andrey Nikolayevich Kolmogorov, Russian mathematician (d. 1987)
- 1918 - Birth of Gerard Henri de Vaucouleurs, French astronomer (d. 1995)
- 1931 - Birth of Felix Berezin, Russian mathematician (d. 1980)
- 1953 - Francis Crick and James D. Watson publish Molecular structure of nucleic acids: a structure for deoxyribose nucleic acid describing the double helix structure of DNA.
- 1959 - The St. Lawrence Seaway, linking the North American Great Lakes and the Atlantic Ocean, officially opens to shipping.
- 1961 - Robert Noyce is granted a patent for an integrated circuit
- 2000 - Death of Lucien le Cam, French mathematician (b. 1924)