<!-- "none" is preferred when the title is sufficiently descriptive; see WP:SDNONE -->
The year 1590 in science and technology involved some significant events.
Botany
- Establishment of Hortus Botanicus Leiden. Its director was Carolus Clusius.
Births
- Marie Fouquet, French medical writer (died 1681)
- approx. date – Giovanni Battista Zupi, Italian astronomer (died 1650)
Deaths
- August 25 – Giulio Alessandrini, Italian physician, author, and poet (born 1506).
- December 20 – Ambroise Paré, French surgeon (born c. 1510).