Portal:History of science/Selected anniversaries/July 25
- 1616 - Death of Andreas Libavius, German physician and chemist (b. 1550)
- 1799 - Birth of David Douglas, Scottish botanist (d. 1834)
- 1837 - The first commercial use of an electric telegraph was successfully demonstrated by William Cooke and Charles Wheatstone on 25 July 1837 between Euston and Camden Town in London
- 1843 - Death of Charles Macintosh, Scottish chemist and inventor (b. 1766)
- 1920 - Birth of Rosalind Franklin, English scientist (d. 1958)
- 1963 - Death of Ugo Cerletti, Italian neurologist (b. 1877)
- 1978 - Louise Brown, the world's first "test tube baby" is born