1640 in science
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|List of years in science (table)|
|... 1630 . 1631 . 1632 . 1633 . 1634 . 1635 . 1636 ...
1637 1638 1639 -1640- 1641 1642 1643
... 1644 . 1645 . 1646 . 1647 . 1648 . 1649 . 1650 ...
|Art . Archaeology . Architecture . Literature . Music . Philosophy . Science +...|
- John Parkinson publishes Theatrum Botanicum:The Theater of Plants, or, An Herbal of a Large Extent.
- The Cape Verde Island of Sal is discovered, originally named "Llana" (meaning "flat").
- The 16-year old Blaise Pascal demonstrates the properties of the hexagrammum mysticum in his Essai pour les coniques which he sends to Mersenne.
- October 18 – Fermat states his "little theorem" in a letter to Frénicle de Bessy: if p is a prime number, then for any integer a, a p − a will be evenly divisible by p.
- December 25 – Fermat claims a proof of the theorem on sums of two squares in a letter to Mersenne ("Fermat's Christmas Theorem"): an odd prime p is expressible as the sum of two squares.
- The micrometer is developed.
- A form of bayonet is invented; in later years it will gradually replace the pike.
- The reticle telescope is developed and initiates the birth of sharpshooting.
- April 1 – Georg Mohr, Danish mathematician (died 1697)
- December 13 (bapt.) – Robert Plot, English naturalist and chemist (died 1696)
- Tran, Linh. "Theatrum Botanicum: The Theater of Plants, or, An Herbal of a Large Extent". Texas A&M University Bioinformatics Working Group. Archived from the original on 14 May 2011. Retrieved 2011-04-01.