thumb | right | Bee drawing with zoomed parts
<!-- "none" is preferred when the title is sufficiently descriptive; see WP:SDNONE -->
The year 1625 in science and technology involved some significant events.
Chemistry
- First description of hydrogen by Johann Baptista van Helmont. First to use the word "gas".
- Johann Rudolf Glauber discovers sodium sulfate (sal mirabilis or "Glauber's salt", used as a laxative) in Austrian spring water.
Births
- June 8 – Giovanni Cassini, Italian astronomer (died 1712)
- March 25 – John Collins, English mathematician (died 1683)
- August 13 – Rasmus Bartholin, Danish scientist (died 1698)
- December 16 – Erhard Weigel, German mathematician and scientific populariser (died 1699)
- December 20 – David Gregory, Scottish physician and inventor (died 1720)
- Samuel Morland, English inventor (died 1695)
Deaths
- March 7 – Johann Bayer, German uranographer (born 1572)
- April 7 – Adriaan van den Spiegel, Flemish-born anatomist and botanist (born 1578)
- May 6 – George Bruce of Carnock, Scottish coal mining engineer (born c.1550)
- Ferrante Imperato, Neapolitan natural historian (born 1550)
- Willem Schouten, Dutch navigator, died at sea (born c. 1567)